11:01 a.m.
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Further info about this case:
An already installed and running VM (Centos7) with static IPv4 assignment, =
if changed to DHCP mode, do not acquire the IP address.
In this case, tcpdump taken on the VM, do not show DHCP offer packets that =
are instead seen on the host bond interface.
Seems that something is filtering DHCP offers between host physical eth int=
erfaces and VM virtio eth interface.
Physical servers on the same VLAN keep DHCP offers and boot from PXE correc=
tly.
Roberto
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</head <body lang=3D"IT"
link=3D"blue" vlink=3D"purple" <div
class=3D"WordSection1" <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D">Further=
info about this case:<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D">An alre=
ady installed and running VM (Centos7) with static IPv4 assignment, if =
; changed to DHCP mode, do not acquire the IP
address.<o:p></o:p></span></p=
<p class=3D"MsoNormal"><span
lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D">In this=
case, tcpdump taken on the VM, do not show DHCP offer packets that are ins=
tead seen on the host bond interface.<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US" style=3D"color:#1F497D">Seems t=
hat something is filtering DHCP offers between host physical eth interfaces=
and VM virtio eth interface.<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US" style=3D"color:#1F497D">Physica=
l servers on the same VLAN keep DHCP offers and boot from PXE correctly.<o:=
p></o:p></span></p <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D">Roberto=
<o:p></o:p></span></p <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p
<div <p
class=3D"MsoNormal"><span lang=3D"EN-US"
style=3D"color:#1F497D;mso-fare=
ast-language:IT"><o:p> </o:p></span></p </div <p
class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Hi all<o:p></o:p></sp=
an></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">We are using oVirt en=
gine 3.5.1-0.0 on Centos 6.6<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">We are deploying two =
hosts with
vdsm-4.16.10-8.gitc937927.el7.x86_64<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">No hosted-engine, it =
run on a dedicates VM, outside oVirt.<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Behavior: PXE boot of=
a VM, ends in timeout (0x4c106035), instead to accept the DHCP offer comin=
g from DHCP server.<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Tcpdump capture start=
ed on the vdsm host, bond0 interface shows clearly that DHCP offers reach t=
he vdsm interfaces
<span style=3D"color:#1F497D">></span>three times before PXE
client ends=
in timeout.<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Incoming DHCP offer i=
s correctly tagged when it comes to the bond0 interface and forwarded to th=
e bond0.bridge
<span
style=3D"color:#1F497D">></span>interface.<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">PXE simply ignore it.=
PXE version is gPXE 0.9.7.<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">bond0.bridge interfac=
e is already setup with STP=3Doff and
DELAY=3D0.<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">If we install a VM us=
ing command line boot parameters, VM install & run fine. The issu=
e is only related to PXE process,
<span style=3D"color:#1F497D">></span>when it is expected to
use the DHC=
P offer.<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">I can provide tcpdump=
capture, but I’ve not attached to the email because I’m quite =
new of the community and don’t
<span style=3D"color:#1F497D">></span>know if it is
allowed/correct.<o:p=
></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">On another host, unde=
r the same engine, running vdsm-4.16.12-7.gita30da75.el6.x86_64 on Centos6.=
6, this behavior is
<span style=3D"color:#1F497D">></span>not happening,
everything works fi=
ne.<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Any idea/suggestion/f=
urther investigation ?<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Thanks for attention<=
o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US" st=
yle=3D"color:#1F497D">></span><span
lang=3D"EN-US">Best regards<o:p></o:=
p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt"><span lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal"
style=3D"margin-left:35.4pt;text-autospace:none"><sp=
an style=3D"font-size:10.0pt;font-family:Consolas;mso-fareast-language:IT">=
Roberto Nunin<o:p></o:p></span></p <p
class=3D"MsoNormal"
style=3D"margin-left:35.4pt;text-autospace:none"><sp=
an style=3D"font-size:10.0pt;font-family:Consolas;mso-fareast-language:IT">=
Infrastructure Manager<o:p></o:p></span></p <p class=3D"MsoNormal"
style=3D"margin-left:35.4pt;text-autospace:none"><sp=
an style=3D"font-size:10.0pt;font-family:Consolas;mso-fareast-language:IT">=
Italy<o:p></o:p></span></p <p
class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span
lang=3D"EN-US"><o=
:p> </o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">Here are interfaces configs:<o:=
p></o:p></span></p <p
class=3D"MsoNormal"><b><span
lang=3D"EN-US">eno1:<o:p></o:p></span></b><=
/p <p class=3D"MsoNormal"><span
lang=3D"EN-US">DEVICE=3D"eno1"<o:p><=
/o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">HWADDR=3D"38:63:bb:4a:47:b=
0"<o:p></o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">MASTER=3D"bond0"<o:p>=
</o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">NM_CONTROLLED=3D"no"<=
o:p></o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">ONBOOT=3D"yes"<o:p></=
o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">SLAVE=3D"yes"<o:p></o=
:p></span></p <p
class=3D"MsoNormal"><b>eno2:<o:p></o:p></b></p <p
class=3D"MsoNormal">DEVICE=3D"eno2"<o:p></o:p></p <p
class=3D"MsoNormal">HWADDR=3D"38:63:bb:4a:47:b4"<o:p></o:p></p=
<p class=3D"MsoNormal"><span
lang=3D"EN-US">MASTER=3D"bond0"<o:p>=
</o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">NM_CONTROLLED=3D"no"<=
o:p></o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">ONBOOT=3D"yes"<o:p></=
o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">SLAVE=3D"yes"<o:p></o=
:p></span></p <p
class=3D"MsoNormal"><b><span
lang=3D"EN-US">bond0:<o:p></o:p></span></b>=
</p <p class=3D"MsoNormal"><span
lang=3D"EN-US">BONDING_OPTS=3D"mode=3D4 m=
iimon=3D100"<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">DEVICE=3D"bond0"<o:p>=
</o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">NM_CONTROLLED=3D"no"<=
o:p></o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">ONBOOT=3D"yes"<o:p></=
o:p></span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">TYPE=3D"Bond"<o:p></o=
:p></span></p <p
class=3D"MsoNormal"><b><span
lang=3D"EN-US">bond0.3500:<o:p></o:p></span=
></b></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">DEVICE=3Dbond0.3500<o:p></o:p><=
/span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">VLAN=3Dyes<o:p></o:p></span></p=
<p class=3D"MsoNormal"><span
lang=3D"EN-US">BRIDGE=3DDMZ3_DEV<o:p></o:p></s=
pan></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">ONBOOT=3Dno<o:p></o:p></span></=
p <p class=3D"MsoNormal"><span
lang=3D"EN-US">MTU=3D1500<o:p></o:p></span></p=
<p class=3D"MsoNormal"><span
lang=3D"EN-US">NM_CONTROLLED=3Dno<o:p></o:p></=
span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">HOTPLUG=3Dno<o:p></o:p></span><=
/p <p class=3D"MsoNormal"><b><span
lang=3D"EN-US">DMZ3_DEV:<o:p></o:p></span><=
/b></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">DEVICE=3DDMZ3_DEV<o:p></o:p></s=
pan></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">TYPE=3DBridge<o:p></o:p></span>=
</p <p class=3D"MsoNormal"><span
lang=3D"EN-US">DELAY=3D0<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">STP=3Doff<o:p></o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US">ONBOOT=3Dno<o:p></o:p></span></=
p <p class=3D"MsoNormal"><span
lang=3D"EN-US">MTU=3D1500<o:p></o:p></span></p=
<p class=3D"MsoNormal"><span
lang=3D"EN-US">DEFROUTE=3Dno<o:p></o:p></span>=
</p <p class=3D"MsoNormal"><span
lang=3D"EN-US">NM_CONTROLLED=3Dno<o:p></o:p></=
span></p <p
class=3D"MsoNormal"><span
lang=3D"EN-US">HOTPLUG=3Dno<o:p></o:p></span><=
/p <p class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p class=3D"MsoNormal"><span
lang=3D"EN-US"><o:p> </o:p></span></p <p
class=3D"MsoNormal"><o:p> </o:p></p </div
<br <hr <font
face=3D"Courier New" color=3D"Black" size=3D"2">Questo
messaggio e' i=
ndirizzato esclusivamente al destinatario indicato e potrebbe contenere inf=
ormazioni confidenziali, riservate o proprietarie. Qualora la presente veni=
sse ricevuta per errore, si prega di segnalarlo
immediatamente al mittente, cancellando l'originale e ogni sua copia e dis=
truggendo eventuali copie cartacee. Ogni altro uso e' strettamente proibito=
e potrebbe essere fonte di violazione di legge.<br
<br This message is for the designated
recipient only and may contain privilege=
d, proprietary, or otherwise private information. If you have received it i=
n error, please notify the sender immediately, deleting the original and al=
l copies and destroying any hard
copies. Any other use is strictly prohibited and may be unlawful.<br </font
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--_000_8C2CD99696B62B409EBEBFDF87C83FBF59B5604A10DENU1XMAIL02p_--
Hi all
We are using oVirt engine 3.5.1-0.0 on Centos 6.6
We are deploying two hosts with vdsm-4.16.10-8.gitc937927.el7.x86_64
No hosted-engine, it run on a dedicates VM, outside oVirt.
Behavior: PXE boot of a VM, ends in timeout (0x4c106035), instead to
accep=
t the DHCP offer coming from DHCP server.
Tcpdump capture started on the vdsm host, bond0 interface shows
clearly th=
at DHCP offers reach the vdsm interfaces >three times before PXE
client end=
s in timeout.
Incoming DHCP offer is correctly tagged when it comes to the bond0
interfa=
ce and forwarded to the bond0.bridge >interface.
PXE simply ignore it. PXE version is gPXE 0.9.7.
bond0.bridge interface is already setup with STP=3Doff and DELAY=3D0.
If we install a VM using command line boot parameters, VM install
& run f=
ine. The issue is only related to PXE process, >when it is expected
to use =
the DHCP offer.
I can provide tcpdump capture, but I've not attached to the email
because =
I'm quite new of the community and don't >know if it is
allowed/correct.
On another host, under the same engine, running
vdsm-4.16.12-7.gita30da75.=
el6.x86_64 on Centos6.6, this behavior is >not
happening, everything works =
fine.
Any idea/suggestion/further investigation ?
Thanks for attention
Best regards
Roberto Nunin
Infrastructure Manager
Italy
Here are interfaces configs:
eno1:
DEVICE=3D"eno1"
HWADDR=3D"38:63:bb:4a:47:b0"
MASTER=3D"bond0"
NM_CONTROLLED=3D"no"
ONBOOT=3D"yes"
SLAVE=3D"yes"
eno2:
DEVICE=3D"eno2"
HWADDR=3D"38:63:bb:4a:47:b4"
MASTER=3D"bond0"
NM_CONTROLLED=3D"no"
ONBOOT=3D"yes"
SLAVE=3D"yes"
bond0:
BONDING_OPTS=3D"mode=3D4 miimon=3D100"
DEVICE=3D"bond0"
NM_CONTROLLED=3D"no"
ONBOOT=3D"yes"
TYPE=3D"Bond"
bond0.3500:
DEVICE=3Dbond0.3500
VLAN=3Dyes
BRIDGE=3DDMZ3_DEV
ONBOOT=3Dno
MTU=3D1500
NM_CONTROLLED=3Dno
HOTPLUG=3Dno
DMZ3_DEV:
DEVICE=3DDMZ3_DEV
TYPE=3DBridge
DELAY=3D0
STP=3Doff
ONBOOT=3Dno
MTU=3D1500
DEFROUTE=3Dno
NM_CONTROLLED=3Dno
HOTPLUG=3Dno
________________________________
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e p=
otrebbe contenere informazioni confidenziali, riservate o proprietarie. Qua=
lora la presente venisse ricevuta per errore, si prega di segnalarlo immedi=
atamente al mittente, cancellando l'originale e ogni sua copia e distruggen=
do eventuali copie cartacee. Ogni altro uso e' strettamente proibito e potr=
ebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privilege=
d, proprietary, or otherwise private information. If you have received it i=
n error, please notify the sender immediately, deleting the original and al=
l copies and destroying any hard copies. Any other use is strictly prohibit=
ed and may be unlawful.
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Hi,
Is your DHCP server a VM running on the same host? I've seem some
strange issues where a VM could not obtain a DHCP lease if it was
running on the same physical machine as the client. If this is the case,
I can look up what I had to change, otherwise ignore it.
Regards,
Rik
Further info about this case:
An already installed and running VM (Centos7) with static IPv4 assignment, if changed to
DHCP mode, do not acquire the
IP address.
In this case, tcpdump taken on the VM, do not show DHCP offer packets that are instead
seen on the host bond interface.
Seems that something is filtering DHCP offers between host physical eth interfaces and VM
virtio eth interface.
Physical servers on the same VLAN keep DHCP offers and boot from PXE correctly.
Roberto
>Hi all
>We are using oVirt engine 3.5.1-0.0 on Centos 6.6
>We are deploying two hosts with vdsm-4.16.10-8.gitc937927.el7.x86_64
>No hosted-engine, it run on a dedicates VM, outside oVirt.
>Behavior: PXE boot of a VM, ends in timeout (0x4c106035), instead to accept the DHCP
offer coming from DHCP server.
>Tcpdump capture started on the vdsm host, bond0 interface shows clearly that DHCP
offers reach the vdsm interfaces
>three times before PXE client ends in timeout.
>Incoming DHCP offer is correctly tagged when it comes to the bond0 interface and
forwarded to the bond0.bridge
>interface.
>PXE simply ignore it. PXE version is gPXE 0.9.7.
>bond0.bridge interface is already setup with STP=off and DELAY=0.
>If we install a VM using command line boot parameters, VM install & run fine.
The issue is only related to PXE
process, >when it is expected to use the DHCP offer.
>I can provide tcpdump capture, but I¢ve not attached to the email because I¢m quite
new of the community and don¢t
>know if it is allowed/correct.
>On another host, under the same engine, running vdsm-4.16.12-7.gita30da75.el6.x86_64
on Centos6.6, this behavior is
>not happening, everything works fine.
>Any idea/suggestion/further investigation ?
>Thanks for attention
>Best regards
Roberto Nunin
Infrastructure Manager
Italy
Here are interfaces configs:
eno1:
DEVICE="eno1"
HWADDR="38:63:bb:4a:47:b0"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
eno2:
DEVICE="eno2"
HWADDR="38:63:bb:4a:47:b4"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
bond0:
BONDING_OPTS="mode=4 miimon=100"
DEVICE="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Bond"
bond0.3500:
DEVICE=bond0.3500
VLAN=yes
BRIDGE=DMZ3_DEV
ONBOOT=no
MTU=1500
NM_CONTROLLED=no
HOTPLUG=no
DMZ3_DEV:
DEVICE=DMZ3_DEV
TYPE=Bridge
DELAY=0
STP=off
ONBOOT=no
MTU=1500
DEFROUTE=no
NM_CONTROLLED=no
HOTPLUG=no
_______________________________________________________________________________________________________________________
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altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged,
proprietary, or otherwise private
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deleting the original and all
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--981903160-1973418136-1431024381=:19841--
3:33 a.m.
New subject: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Hi Rick
No, DHCP is provided by an external appliance.
Thanks for answering !
Roberto
-----Messaggio originale-----
Da: Rik Theys [mailto:Rik.Theys@esat.kuleuven.be]
Inviato: giovedì 7 maggio 2015 20:46
A: NUNIN Roberto
Cc: users(a)ovirt.org
Oggetto: Re: [ovirt-users] R: PXE boot of a VM on vdsm don't read DHCP offer
Hi,
Is your DHCP server a VM running on the same host? I've seem some
strange issues where a VM could not obtain a DHCP lease if it was
running on the same physical machine as the client. If this is the case,
I can look up what I had to change, otherwise ignore it.
Regards,
Rik
Further info about this case:
An already installed and running VM (Centos7) with static IPv4 assignment, if changed to
DHCP mode, do not acquire the
IP address.
In this case, tcpdump taken on the VM, do not show DHCP offer packets that are instead
seen on the host bond interface.
Seems that something is filtering DHCP offers between host physical eth interfaces and VM
virtio eth interface.
Physical servers on the same VLAN keep DHCP offers and boot from PXE correctly.
Roberto
>Hi all
>We are using oVirt engine 3.5.1-0.0 on Centos 6.6
>We are deploying two hosts with vdsm-4.16.10-8.gitc937927.el7.x86_64
>No hosted-engine, it run on a dedicates VM, outside oVirt.
>Behavior: PXE boot of a VM, ends in timeout (0x4c106035), instead to accept the DHCP
offer coming from DHCP server.
>Tcpdump capture started on the vdsm host, bond0 interface shows clearly that DHCP
offers reach the vdsm interfaces
>three times before PXE client ends in timeout.
>Incoming DHCP offer is correctly tagged when it comes to the bond0 interface and
forwarded to the bond0.bridge
>interface.
>PXE simply ignore it. PXE version is gPXE 0.9.7.
>bond0.bridge interface is already setup with STP=off and DELAY=0.
>If we install a VM using command line boot parameters, VM install & run fine.
The issue is only related to PXE
process, >when it is expected to use the DHCP offer.
>I can provide tcpdump capture, but Iʼve not attached to the email because Iʼm quite
new of the community and donʼt
>know if it is allowed/correct.
>On another host, under the same engine, running vdsm-4.16.12-7.gita30da75.el6.x86_64
on Centos6.6, this behavior is
>not happening, everything works fine.
>Any idea/suggestion/further investigation ?
>Thanks for attention
>Best regards
Roberto Nunin
Infrastructure Manager
Italy
Here are interfaces configs:
eno1:
DEVICE="eno1"
HWADDR="38:63:bb:4a:47:b0"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
eno2:
DEVICE="eno2"
HWADDR="38:63:bb:4a:47:b4"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
bond0:
BONDING_OPTS="mode=4 miimon=100"
DEVICE="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Bond"
bond0.3500:
DEVICE=bond0.3500
VLAN=yes
BRIDGE=DMZ3_DEV
ONBOOT=no
MTU=1500
NM_CONTROLLED=no
HOTPLUG=no
DMZ3_DEV:
DEVICE=DMZ3_DEV
TYPE=Bridge
DELAY=0
STP=off
ONBOOT=no
MTU=1500
DEFROUTE=no
NM_CONTROLLED=no
HOTPLUG=no
_______________________________________________________________________________________________________________________
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni
confidenziali, riservate o proprietarie. Qualora la presente venisse ricevuta per errore,
si prega di segnalarlo
immediatamente al mittente, cancellando l'originale e ogni sua copia e distruggendo
eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged,
proprietary, or otherwise private
information. If you have received it in error, please notify the sender immediately,
deleting the original and all
copies and destroying any hard copies. Any other use is strictly prohibited and may be
unlawful.
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
5:08 a.m.
On Thu, May 07, 2015 at 06:01:14PM +0200, NUNIN Roberto wrote:
Further info about this case:
An already installed and running VM (Centos7) with static IPv4 assignment, if changed to
DHCP mode, do not acquire the IP address.
In this case, tcpdump taken on the VM, do not show DHCP offer packets that are instead
seen on the host bond interface.
Seems that something is filtering DHCP offers between host physical eth interfaces and VM
virtio eth interface.
Physical servers on the same VLAN keep DHCP offers and boot from PXE correctly.
Roberto
>Hi all
>We are using oVirt engine 3.5.1-0.0 on Centos 6.6
>We are deploying two hosts with vdsm-4.16.10-8.gitc937927.el7.x86_64
>No hosted-engine, it run on a dedicates VM, outside oVirt.
>Behavior: PXE boot of a VM, ends in timeout (0x4c106035), instead to accept the DHCP
offer coming from DHCP server.
>Tcpdump capture started on the vdsm host, bond0 interface shows clearly that DHCP
offers reach the vdsm interfaces >three times before PXE client ends in timeout.
>Incoming DHCP offer is correctly tagged when it comes to the bond0 interface and
forwarded to the bond0.bridge >interface.
>PXE simply ignore it. PXE version is gPXE 0.9.7.
>bond0.bridge interface is already setup with STP=off and DELAY=0.
>If we install a VM using command line boot parameters, VM install & run fine.
The issue is only related to PXE process, >when it is expected to use the DHCP offer.
>I can provide tcpdump capture, but I've not attached to the email because I'm
quite new of the community and don't >know if it is allowed/correct.
>On another host, under the same engine, running vdsm-4.16.12-7.gita30da75.el6.x86_64
on Centos6.6, this behavior is >not happening, everything works fine.
>Any idea/suggestion/further investigation ?
>Thanks for attention
>Best regards
Which kernel does the el7 host run? I think that Ido has seen a case
where `brctl showmacs` was not populated with the VM mac, despite a
packet coming out of it.
Can you tcpdump and check whether the bridge propogated the DHCP offer
to the tap device of the said VM? Does the packet generated by
`ether-wake MAC-of-VM` reach the tap device?
Roberto Nunin
Infrastructure Manager
Italy
Here are interfaces configs:
eno1:
DEVICE="eno1"
HWADDR="38:63:bb:4a:47:b0"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
eno2:
DEVICE="eno2"
HWADDR="38:63:bb:4a:47:b4"
MASTER="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
SLAVE="yes"
bond0:
BONDING_OPTS="mode=4 miimon=100"
DEVICE="bond0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Bond"
bond0.3500:
DEVICE=bond0.3500
VLAN=yes
BRIDGE=DMZ3_DEV
ONBOOT=no
MTU=1500
NM_CONTROLLED=no
HOTPLUG=no
DMZ3_DEV:
DEVICE=DMZ3_DEV
TYPE=Bridge
DELAY=0
STP=off
ONBOOT=no
MTU=1500
DEFROUTE=no
NM_CONTROLLED=no
HOTPLUG=no
8:11 a.m.
New subject: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Hi Dan
Thanks for answering
Which kernel does the el7 host run? I think that Ido has seen a case
where `brctl showmacs` was not populated with the VM mac, despite a
packet coming out of it.
Kernel is: 3.10.0-123.20.1.el7.x86_64, package is vdsm only. Brctl isn't available
within vdsm only package.
Can you tcpdump and check whether the bridge propogated the DHCP offer
to the tap device of the said VM? Does the packet generated by
`ether-wake MAC-of-VM` reach the tap device?
Yes: host "see" the broadcast :
0.000000 0.0.0.0 255.255.255.255 DHCP 346 DHCP
Discover - Transaction ID 0x69267b67
It came from the right MAC:
Source: Qumranet_15:81:03 (00:1a:4a:15:81:03)
And it is tagged correctly:
802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
This is the offer, on the bond interface:
1.012355 10.155.124.2 10.155.124.246 DHCP 346 DHCP Offer
- Transaction ID 0x69267b67
Layer 2 info:
Ethernet II, Src: Cisco_56:83:c3 (84:78:ac:56:83:c3), Dst: Qumranet_15:81:03
(00:1a:4a:15:81:03)
Tagging on the bond:
802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
The tag is correctly removed when DHCP offer is forwarded over the bond.3500.
Here's the offer content, seems everything right:
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 10.155.124.246 (10.155.124.246)
Next server IP address: 10.155.124.223 (10.155.124.223)
Relay agent IP address: 10.155.124.2 (10.155.124.2)
Client MAC address: Qumranet_15:81:03 (00:1a:4a:15:81:03)
Client hardware address padding: 00000000000000000000
Server host name: 10.155.124.223
Boot file name: pxelinux.0
Magic cookie: DHCP
Nothing of this offer appear on the VM side.
ether-wake -i bond0.3500 00:1a:4a:15:81:03 (started from the host)
reach the VM eth0 interface:
2.002028 HewlettP_4a:47:b0 Qumranet_15:81:03 WOL 116 MagicPacket
for Qumranet_15:81:03 (00:1a:4a:15:81:03)
Really strange behavior.
Roberto
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
9:14 a.m.
New subject: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Fri, May 08, 2015 at 03:11:25PM +0200, NUNIN Roberto wrote:
Hi Dan
Thanks for answering
> Which kernel does the el7 host run? I think that Ido has seen a case
> where `brctl showmacs` was not populated with the VM mac, despite a
> packet coming out of it.
Kernel is: 3.10.0-123.20.1.el7.x86_64, package is vdsm only. Brctl isn't available
within vdsm only package.
Could you try upgrading to a more up-to-date
http://mirror.centos.org/centos-7/7.1.1503/updates/x86_64/Packages/kernel...
?
bridge-utils is a vdsm dependency. It must exist on your host. Please
see if the mac of the vNIC shows up on `brctl showmacs` as it should.
>
> Can you tcpdump and check whether the bridge propogated the DHCP offer
> to the tap device of the said VM? Does the packet generated by
> `ether-wake MAC-of-VM` reach the tap device?
Yes: host "see" the broadcast :
0.000000 0.0.0.0 255.255.255.255 DHCP 346 DHCP
Discover - Transaction ID 0x69267b67
It came from the right MAC:
Source: Qumranet_15:81:03 (00:1a:4a:15:81:03)
And it is tagged correctly:
802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
This is the offer, on the bond interface:
1.012355 10.155.124.2 10.155.124.246 DHCP 346 DHCP
Offer - Transaction ID 0x69267b67
Layer 2 info:
Ethernet II, Src: Cisco_56:83:c3 (84:78:ac:56:83:c3), Dst: Qumranet_15:81:03
(00:1a:4a:15:81:03)
Tagging on the bond:
802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
The tag is correctly removed when DHCP offer is forwarded over the bond.3500.
Here's the offer content, seems everything right:
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 10.155.124.246 (10.155.124.246)
Next server IP address: 10.155.124.223 (10.155.124.223)
Relay agent IP address: 10.155.124.2 (10.155.124.2)
Client MAC address: Qumranet_15:81:03 (00:1a:4a:15:81:03)
Client hardware address padding: 00000000000000000000
Server host name: 10.155.124.223
Boot file name: pxelinux.0
Magic cookie: DHCP
Nothing of this offer appear on the VM side.
But does it show on the host's bridge? on the tap device?
ether-wake -i bond0.3500 00:1a:4a:15:81:03 (started from the host)
reach the VM eth0 interface:
2.002028 HewlettP_4a:47:b0 Qumranet_15:81:03 WOL 116
MagicPacket for Qumranet_15:81:03 (00:1a:4a:15:81:03)
Really strange behavior.
Roberto
3:51 a.m.
New subject: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Hi Dan, guys
Sorry for very late follow-up, but we had a lot of other topics to fix just before to go
back on this one.
We have tried another approach just to check if the kernel of the vdsm iso image used to
install the host could create the problem I've reported to the list.
Now we have reinstalled the same hardware with latest CentOS 7.1, fully updated.
Installed vdsm, then joined the oVirt cluster.
Well, we are observing the same behavior as before.
No DHCP offer is reaching the booting VM, and:
brctl showmacs <bridge_if> show us the booting vm mac-address
tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
We have also tried to remove ANY firewall rule.
It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if we install
a vm manually and assign a static IP, it works fine.
If we switch to dhcp, the vm don't get the dynamic one.
In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP offer.
Any further suggestion/hint ?
RN
-----Messaggio originale-----
Da: Dan Kenigsberg [mailto:danken@redhat.com]
Inviato: lunedì 18 maggio 2015 16:14
A: NUNIN Roberto
Cc: users(a)ovirt.org; ibarkan(a)redhat.com
Oggetto: Re: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read DHCP
offer
On Fri, May 08, 2015 at 03:11:25PM +0200, NUNIN Roberto wrote:
> Hi Dan
> Thanks for answering
>
>
>
> > Which kernel does the el7 host run? I think that Ido has seen a case
> > where `brctl showmacs` was not populated with the VM mac, despite a
> > packet coming out of it.
>
> Kernel is: 3.10.0-123.20.1.el7.x86_64, package is vdsm only. Brctl isn't
available within vdsm only package.
Could you try upgrading to a more up-to-date
http://mirror.centos.org/centos-
7/7.1.1503/updates/x86_64/Packages/kernel-3.10.0-
229.4.2.el7.x86_64.rpm
?
bridge-utils is a vdsm dependency. It must exist on your host. Please
see if the mac of the vNIC shows up on `brctl showmacs` as it should.
> >
> > Can you tcpdump and check whether the bridge propogated the DHCP
offer
> > to the tap device of the said VM? Does the packet generated by
> > `ether-wake MAC-of-VM` reach the tap device?
>
> Yes: host "see" the broadcast :
> 0.000000 0.0.0.0 255.255.255.255 DHCP 346
DHCP
Discover - Transaction ID 0x69267b67
> It came from the right MAC:
> Source: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> And it is tagged correctly:
> 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
>
> This is the offer, on the bond interface:
> 1.012355 10.155.124.2 10.155.124.246 DHCP 346
DHCP
Offer - Transaction ID 0x69267b67
> Layer 2 info:
> Ethernet II, Src: Cisco_56:83:c3 (84:78:ac:56:83:c3), Dst:
Qumranet_15:81:03 (00:1a:4a:15:81:03)
> Tagging on the bond:
> 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
>
> The tag is correctly removed when DHCP offer is forwarded over the
bond.3500.
> Here's the offer content, seems everything right:
>
> Client IP address: 0.0.0.0 (0.0.0.0)
> Your (client) IP address: 10.155.124.246 (10.155.124.246)
> Next server IP address: 10.155.124.223 (10.155.124.223)
> Relay agent IP address: 10.155.124.2 (10.155.124.2)
> Client MAC address: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> Client hardware address padding: 00000000000000000000
> Server host name: 10.155.124.223
> Boot file name: pxelinux.0
> Magic cookie: DHCP
>
> Nothing of this offer appear on the VM side.
But does it show on the host's bridge? on the tap device?
>
> ether-wake -i bond0.3500 00:1a:4a:15:81:03 (started from the host)
> reach the VM eth0 interface:
> 2.002028 HewlettP_4a:47:b0 Qumranet_15:81:03 WOL 116
MagicPacket for Qumranet_15:81:03 (00:1a:4a:15:81:03)
>
> Really strange behavior.
>
> Roberto
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
5:31 a.m.
New subject: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Fri, Jul 03, 2015 at 10:51:52AM +0200, NUNIN Roberto wrote:
Hi Dan, guys
Sorry for very late follow-up, but we had a lot of other topics to fix just before to go
back on this one.
We have tried another approach just to check if the kernel of the vdsm iso image used to
install the host could create the problem I've reported to the list.
Now we have reinstalled the same hardware with latest CentOS 7.1, fully updated.
Installed vdsm, then joined the oVirt cluster.
Well, we are observing the same behavior as before.
No DHCP offer is reaching the booting VM, and:
brctl showmacs <bridge_if> show us the booting vm mac-address
tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
The offer should be replicated to the tap device (vnetXXX). I assume
that it does not?
We have also tried to remove ANY firewall rule.
It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if we
install a vm manually and assign a static IP, it works fine.
If we switch to dhcp, the vm don't get the dynamic one.
In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP offer.
Any further suggestion/hint ?
Which bond mode are you using? I recently seen
https://bugzilla.redhat.com/show_bug.cgi?id=1230638#c22
closed as duplicate of
Bug 1094842 - Bonding modes 0, 5 and 6 should be avoided for VM
networks
5:32 a.m.
New subject: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
----- Original Message -----
Hi Dan, guys
Sorry for very late follow-up, but we had a lot of other topics to fix just
before to go back on this one.
We have tried another approach just to check if the kernel of the vdsm iso
image used to install the host could create the problem I've reported to the
list.
Now we have reinstalled the same hardware with latest CentOS 7.1, fully
updated.
Installed vdsm, then joined the oVirt cluster.
Well, we are observing the same behavior as before.
No DHCP offer is reaching the booting VM, and:
brctl showmacs <bridge_if> show us the booting vm mac-address
tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
We have also tried to remove ANY firewall rule.
It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if
we install a vm manually and assign a static IP, it works fine.
If we switch to dhcp, the vm don't get the dynamic one.
In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP
offer.
Any further suggestion/hint ?
I've observed this behavior in bug
https://bugzilla.redhat.com/show_bug.cgi?id=1230638
We also removed all firewall rules, checked iPXE and I also saw the requests
going out, but no replies getting to the VM.
But here it sounds like it isn't specific to bonds.
After all I did not find the solution yet.
It is probably a good idea to install the oS with a static IP, and then
switch to dhcp to then use tcpdump inside the vm to see what is reaching
the inside.
- fabian
RN
> -----Messaggio originale-----
> Da: Dan Kenigsberg [mailto:danken@redhat.com]
> Inviato: lunedì 18 maggio 2015 16:14
> A: NUNIN Roberto
> Cc: users(a)ovirt.org; ibarkan(a)redhat.com
> Oggetto: Re: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read DHCP
> offer
>
> On Fri, May 08, 2015 at 03:11:25PM +0200, NUNIN Roberto wrote:
> > Hi Dan
> > Thanks for answering
> >
> >
> >
> > > Which kernel does the el7 host run? I think that Ido has seen a case
> > > where `brctl showmacs` was not populated with the VM mac, despite a
> > > packet coming out of it.
> >
> > Kernel is: 3.10.0-123.20.1.el7.x86_64, package is vdsm only. Brctl isn't
> available within vdsm only package.
>
> Could you try upgrading to a more up-to-date
> http://mirror.centos.org/centos-
> 7/7.1.1503/updates/x86_64/Packages/kernel-3.10.0-
> 229.4.2.el7.x86_64.rpm
> ?
>
> bridge-utils is a vdsm dependency. It must exist on your host. Please
> see if the mac of the vNIC shows up on `brctl showmacs` as it should.
>
> > >
> > > Can you tcpdump and check whether the bridge propogated the DHCP
> offer
> > > to the tap device of the said VM? Does the packet generated by
> > > `ether-wake MAC-of-VM` reach the tap device?
> >
> > Yes: host "see" the broadcast :
> > 0.000000 0.0.0.0 255.255.255.255 DHCP
> > 346 DHCP
> Discover - Transaction ID 0x69267b67
> > It came from the right MAC:
> > Source: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > And it is tagged correctly:
> > 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
> >
> > This is the offer, on the bond interface:
> > 1.012355 10.155.124.2 10.155.124.246 DHCP
> > 346 DHCP
> Offer - Transaction ID 0x69267b67
> > Layer 2 info:
> > Ethernet II, Src: Cisco_56:83:c3 (84:78:ac:56:83:c3), Dst:
> Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > Tagging on the bond:
> > 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
> >
> > The tag is correctly removed when DHCP offer is forwarded over the
> bond.3500.
> > Here's the offer content, seems everything right:
> >
> > Client IP address: 0.0.0.0 (0.0.0.0)
> > Your (client) IP address: 10.155.124.246 (10.155.124.246)
> > Next server IP address: 10.155.124.223 (10.155.124.223)
> > Relay agent IP address: 10.155.124.2 (10.155.124.2)
> > Client MAC address: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > Client hardware address padding: 00000000000000000000
> > Server host name: 10.155.124.223
> > Boot file name: pxelinux.0
> > Magic cookie: DHCP
> >
> > Nothing of this offer appear on the VM side.
>
> But does it show on the host's bridge? on the tap device?
>
> >
> > ether-wake -i bond0.3500 00:1a:4a:15:81:03 (started from the host)
> > reach the VM eth0 interface:
> > 2.002028 HewlettP_4a:47:b0 Qumranet_15:81:03 WOL
> > 116
> MagicPacket for Qumranet_15:81:03 (00:1a:4a:15:81:03)
> >
> > Really strange behavior.
> >
> > Roberto
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9:32 a.m.
New subject: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Thanks for answering. My considerations below.
BR,
ROberto
-----Messaggio originale-----
Da: Dan Kenigsberg [mailto:danken@redhat.com]
Inviato: venerdì 3 luglio 2015 12:31
A: NUNIN Roberto
Cc: users(a)ovirt.org; ibarkan(a)redhat.com
Oggetto: Re: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
DHCP offer
On Fri, Jul 03, 2015 at 10:51:52AM +0200, NUNIN Roberto wrote:
> Hi Dan, guys
>
> Sorry for very late follow-up, but we had a lot of other topics to fix just
before to go back on this one.
>
> We have tried another approach just to check if the kernel of the vdsm iso
image used to install the host could create the problem I've reported to the
list.
>
> Now we have reinstalled the same hardware with latest CentOS 7.1, fully
updated.
> Installed vdsm, then joined the oVirt cluster.
>
> Well, we are observing the same behavior as before.
> No DHCP offer is reaching the booting VM, and:
>
> brctl showmacs <bridge_if> show us the booting vm mac-address
> tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
The offer should be replicated to the tap device (vnetXXX). I assume
that it does not?
The DHCP offer package coming from DHCP server flows thru the bond0 device (tagged), the
VLAN device (tagged) and the bridge interface (not anymore tagged, correct), so it seems
that the path back is complete, considering that brctl showmacs shows the vm mac and If we
put a static IP into the vm nic, it works correctly.
>
> We have also tried to remove ANY firewall rule.
>
> It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if we
install a vm manually and assign a static IP, it works fine.
> If we switch to dhcp, the vm don't get the dynamic one.
> In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP
offer.
>
> Any further suggestion/hint ?
We have mode 4, but already checked active/backup, mode 2, without changes.
Which bond mode are you using? I recently seen
https://bugzilla.redhat.com/show_bug.cgi?id=1230638#c22
closed as duplicate of
Bug 1094842 - Bonding modes 0, 5 and 6 should be avoided for VM
networks
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
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cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
9:37 a.m.
New subject: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Thanks for answering, my considerations below.
BR,
Roberto
-----Messaggio originale-----
Da: Fabian Deutsch [mailto:fdeutsch@redhat.com]
Inviato: venerdì 3 luglio 2015 12:33
A: NUNIN Roberto
Cc: Dan Kenigsberg; users(a)ovirt.org
Oggetto: Re: [ovirt-users] R: R: R: PXE boot of a VM on vdsm don't read
DHCP offer
----- Original Message -----
> Hi Dan, guys
>
> Sorry for very late follow-up, but we had a lot of other topics to fix just
> before to go back on this one.
>
> We have tried another approach just to check if the kernel of the vdsm iso
> image used to install the host could create the problem I've reported to the
> list.
>
> Now we have reinstalled the same hardware with latest CentOS 7.1, fully
> updated.
> Installed vdsm, then joined the oVirt cluster.
>
> Well, we are observing the same behavior as before.
> No DHCP offer is reaching the booting VM, and:
>
> brctl showmacs <bridge_if> show us the booting vm mac-address
> tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
>
> We have also tried to remove ANY firewall rule.
>
> It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if
> we install a vm manually and assign a static IP, it works fine.
> If we switch to dhcp, the vm don't get the dynamic one.
> In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP
> offer.
>
> Any further suggestion/hint ?
I've observed this behavior in bug
https://bugzilla.redhat.com/show_bug.cgi?id=1230638
We also removed all firewall rules, checked iPXE and I also saw the requests
going out, but no replies getting to the VM.
But here it sounds like it isn't specific to bonds.
After all I did not find the solution yet.
In our config, I can see the DHCP offer until the hypervisor bridge interface toward vm
It is probably a good idea to install the oS with a static IP, and then
switch to dhcp to then use tcpdump inside the vm to see what is reaching
the inside.
Already done. Vm do not acquire the IP address and, on the vm side, tcpdump shows only
requests.
At the same time, the DHCP offer s detected on the bridge if of the hypervisor.
With static IP, vm works fine.
- fabian
>
> RN
>
> > -----Messaggio originale-----
> > Da: Dan Kenigsberg [mailto:danken@redhat.com]
> > Inviato: lunedì 18 maggio 2015 16:14
> > A: NUNIN Roberto
> > Cc: users(a)ovirt.org; ibarkan(a)redhat.com
> > Oggetto: Re: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
DHCP
> > offer
> >
> > On Fri, May 08, 2015 at 03:11:25PM +0200, NUNIN Roberto wrote:
> > > Hi Dan
> > > Thanks for answering
> > >
> > >
> > >
> > > > Which kernel does the el7 host run? I think that Ido has seen a
case
> > > > where `brctl showmacs` was not populated with the VM mac, despite
a
> > > > packet coming out of it.
> > >
> > > Kernel is: 3.10.0-123.20.1.el7.x86_64, package is vdsm only. Brctl
isn't
> > available within vdsm only package.
> >
> > Could you try upgrading to a more up-to-date
> > http://mirror.centos.org/centos-
> > 7/7.1.1503/updates/x86_64/Packages/kernel-3.10.0-
> > 229.4.2.el7.x86_64.rpm
> > ?
> >
> > bridge-utils is a vdsm dependency. It must exist on your host. Please
> > see if the mac of the vNIC shows up on `brctl showmacs` as it should.
> >
> > > >
> > > > Can you tcpdump and check whether the bridge propogated the DHCP
> > offer
> > > > to the tap device of the said VM? Does the packet generated by
> > > > `ether-wake MAC-of-VM` reach the tap device?
> > >
> > > Yes: host "see" the broadcast :
> > > 0.000000 0.0.0.0 255.255.255.255 DHCP
> > > 346 DHCP
> > Discover - Transaction ID 0x69267b67
> > > It came from the right MAC:
> > > Source: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > > And it is tagged correctly:
> > > 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
> > >
> > > This is the offer, on the bond interface:
> > > 1.012355 10.155.124.2 10.155.124.246 DHCP
> > > 346 DHCP
> > Offer - Transaction ID 0x69267b67
> > > Layer 2 info:
> > > Ethernet II, Src: Cisco_56:83:c3 (84:78:ac:56:83:c3), Dst:
> > Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > > Tagging on the bond:
> > > 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 3500
> > >
> > > The tag is correctly removed when DHCP offer is forwarded over the
> > bond.3500.
> > > Here's the offer content, seems everything right:
> > >
> > > Client IP address: 0.0.0.0 (0.0.0.0)
> > > Your (client) IP address: 10.155.124.246 (10.155.124.246)
> > > Next server IP address: 10.155.124.223 (10.155.124.223)
> > > Relay agent IP address: 10.155.124.2 (10.155.124.2)
> > > Client MAC address: Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > > Client hardware address padding: 00000000000000000000
> > > Server host name: 10.155.124.223
> > > Boot file name: pxelinux.0
> > > Magic cookie: DHCP
> > >
> > > Nothing of this offer appear on the VM side.
> >
> > But does it show on the host's bridge? on the tap device?
> >
> > >
> > > ether-wake -i bond0.3500 00:1a:4a:15:81:03 (started from the host)
> > > reach the VM eth0 interface:
> > > 2.002028 HewlettP_4a:47:b0 Qumranet_15:81:03 WOL
> > > 116
> > MagicPacket for Qumranet_15:81:03 (00:1a:4a:15:81:03)
> > >
> > > Really strange behavior.
> > >
> > > Roberto
>
> Questo messaggio e' indirizzato esclusivamente al destinatario indicato e
> potrebbe contenere informazioni confidenziali, riservate o proprietarie.
> Qualora la presente venisse ricevuta per errore, si prega di segnalarlo
> immediatamente al mittente, cancellando l'originale e ogni sua copia e
> distruggendo eventuali copie cartacee. Ogni altro uso e' strettamente
> proibito e potrebbe essere fonte di violazione di legge.
>
> This message is for the designated recipient only and may contain
privileged,
> proprietary, or otherwise private information. If you have received it in
> error, please notify the sender immediately, deleting the original and all
> copies and destroying any hard copies. Any other use is strictly prohibited
> and may be unlawful.
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
10:03 a.m.
New subject: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
----- Original Message -----
Thanks for answering, my considerations below.
…
> I've observed this behavior in bug
> https://bugzilla.redhat.com/show_bug.cgi?id=1230638
> We also removed all firewall rules, checked iPXE and I also saw the
> requests
> going out, but no replies getting to the VM.
> But here it sounds like it isn't specific to bonds.
> After all I did not find the solution yet.
In our config, I can see the DHCP offer until the hypervisor bridge interface
toward vm
Just to make sure, is your setup:
NIC -- bridge -- VM?
Or is a bond involved?
>
> It is probably a good idea to install the oS with a static IP, and then
> switch to dhcp to then use tcpdump inside the vm to see what is reaching
> the inside.
Already done. Vm do not acquire the IP address and, on the vm side, tcpdump
shows only requests.
At the same time, the DHCP offer s detected on the bridge if of the
hypervisor.
With static IP, vm works fine.
Yes, it only seems to be around dhcp.
If you don't have a bond involved, then please reopen the bug abaove, and we try to
find
someone to look at it.
- fabian
12:24 p.m.
New subject: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
…
> I've observed this behavior in bug
> https://bugzilla.redhat.com/show_bug.cgi?id=1230638
> We also removed all firewall rules, checked iPXE and I also saw the
> requests
> going out, but no replies getting to the VM.
> But here it sounds like it isn't specific to bonds.
> After all I did not find the solution yet.
In our config, I can see the DHCP offer until the hypervisor bridge interface
toward vm
Just to make sure, is your setup:
NIC -- bridge -- VM?
Or is a bond involved?
NICs (two) - BOND (type 4) - VLAN - BRIDGE - VM
>
> It is probably a good idea to install the oS with a static IP, and then
> switch to dhcp to then use tcpdump inside the vm to see what is reaching
> the inside.
Already done. Vm do not acquire the IP address and, on the vm side, tcpdump
shows only requests.
At the same time, the DHCP offer s detected on the bridge if of the
hypervisor.
With static IP, vm works fine.
Yes, it only seems to be around dhcp.
If you don't have a bond involved, then please reopen the bug abaove, and we try to
find
someone to look at it.
- fabian
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
3:01 a.m.
New subject: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Fri, Jul 03, 2015 at 04:32:50PM +0200, NUNIN Roberto wrote:
Thanks for answering. My considerations below.
BR,
ROberto
> -----Messaggio originale-----
> Da: Dan Kenigsberg [mailto:danken@redhat.com]
> Inviato: venerdì 3 luglio 2015 12:31
> A: NUNIN Roberto
> Cc: users(a)ovirt.org; ibarkan(a)redhat.com
> Oggetto: Re: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
> DHCP offer
>
> On Fri, Jul 03, 2015 at 10:51:52AM +0200, NUNIN Roberto wrote:
> > Hi Dan, guys
> >
> > Sorry for very late follow-up, but we had a lot of other topics to fix just
> before to go back on this one.
> >
> > We have tried another approach just to check if the kernel of the vdsm iso
> image used to install the host could create the problem I've reported to the
> list.
> >
> > Now we have reinstalled the same hardware with latest CentOS 7.1, fully
> updated.
> > Installed vdsm, then joined the oVirt cluster.
> >
> > Well, we are observing the same behavior as before.
> > No DHCP offer is reaching the booting VM, and:
> >
> > brctl showmacs <bridge_if> show us the booting vm mac-address
> > tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp server.
>
> The offer should be replicated to the tap device (vnetXXX). I assume
> that it does not?
The DHCP offer package coming from DHCP server flows thru the bond0
device (tagged), the VLAN device (tagged) and the bridge interface
(not anymore tagged, correct), so it seems that the path back is
complete, considering that brctl showmacs shows the vm mac and If we
put a static IP into the vm nic, it works correctly.
Let's try to trace the offer for one more link. If it does not get to
the tap device vnetXXX - it is clearly a host-side issue. Maybe a bridge
module bug. If you spot the offer on the tap, the it becomes more likely
that the issue is in qemu or elsewere in the virt stack.
I would appreciate your assistence!
>
> >
> > We have also tried to remove ANY firewall rule.
> >
> > It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue. Infact, if
we
> install a vm manually and assign a static IP, it works fine.
> > If we switch to dhcp, the vm don't get the dynamic one.
> > In this case, tcpdump on vm shows only the DHCP discovery, not the DHCP
> offer.
> >
> > Any further suggestion/hint ?
We have mode 4, but already checked active/backup, mode 2, without changes.
Thanks, so it's not that bonding issue.
Regards,
Dan.
3:33 a.m.
New subject: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
Hi Dan
Sorry for question: what do you mean for interface vnetxxxx ?
Currently our path is :
eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
Which one of these ?
Moreover, reading Fabian statements about bonding limits, today I can try to switch to a
config without bonding.
BR
Roberto
-----Messaggio originale-----
Da: Dan Kenigsberg [mailto:danken@redhat.com]
Inviato: lunedì 6 luglio 2015 10:02
A: NUNIN Roberto
Cc: users(a)ovirt.org; ibarkan(a)redhat.com
Oggetto: Re: R: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
DHCP offer
On Fri, Jul 03, 2015 at 04:32:50PM +0200, NUNIN Roberto wrote:
> Thanks for answering. My considerations below.
>
> BR,
>
> ROberto
> > -----Messaggio originale-----
> > Da: Dan Kenigsberg [mailto:danken@redhat.com]
> > Inviato: venerdì 3 luglio 2015 12:31
> > A: NUNIN Roberto
> > Cc: users(a)ovirt.org; ibarkan(a)redhat.com
> > Oggetto: Re: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
> > DHCP offer
> >
> > On Fri, Jul 03, 2015 at 10:51:52AM +0200, NUNIN Roberto wrote:
> > > Hi Dan, guys
> > >
> > > Sorry for very late follow-up, but we had a lot of other topics to fix
just
> > before to go back on this one.
> > >
> > > We have tried another approach just to check if the kernel of the vdsm
iso
> > image used to install the host could create the problem I've reported to
the
> > list.
> > >
> > > Now we have reinstalled the same hardware with latest CentOS 7.1,
fully
> > updated.
> > > Installed vdsm, then joined the oVirt cluster.
> > >
> > > Well, we are observing the same behavior as before.
> > > No DHCP offer is reaching the booting VM, and:
> > >
> > > brctl showmacs <bridge_if> show us the booting vm mac-address
> > > tcpdump -I <bridge_if> show us the dhcp offer coming from dhcp
server.
> >
> > The offer should be replicated to the tap device (vnetXXX). I assume
> > that it does not?
>
> The DHCP offer package coming from DHCP server flows thru the bond0
> device (tagged), the VLAN device (tagged) and the bridge interface
> (not anymore tagged, correct), so it seems that the path back is
> complete, considering that brctl showmacs shows the vm mac and If we
> put a static IP into the vm nic, it works correctly.
Let's try to trace the offer for one more link. If it does not get to
the tap device vnetXXX - it is clearly a host-side issue. Maybe a bridge
module bug. If you spot the offer on the tap, the it becomes more likely
that the issue is in qemu or elsewere in the virt stack.
I would appreciate your assistence!
>
> >
> > >
> > > We have also tried to remove ANY firewall rule.
> > >
> > > It isn't a PXE issue (gPXE 0.9.7) but only a DHCP process issue.
Infact, if
we
> > install a vm manually and assign a static IP, it works fine.
> > > If we switch to dhcp, the vm don't get the dynamic one.
> > > In this case, tcpdump on vm shows only the DHCP discovery, not the
DHCP
> > offer.
> > >
> > > Any further suggestion/hint ?
>
> We have mode 4, but already checked active/backup, mode 2, without
changes.
>
Thanks, so it's not that bonding issue.
Regards,
Dan.
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
11:02 a.m.
New subject: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
Hi Dan
Sorry for question: what do you mean for interface vnetxxxx ?
Currently our path is :
eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
Which one of these ?
Moreover, reading Fabian statements about bonding limits, today I can try to switch to a
config without bonding.
"vm" is a complicated term.
`brctl show` would not show you a "vm" connected to a bridge. When you
WOULD see is a vnet888 tap device. The "other side" of this device is
held by qemu, which implement the VM.
I'm asking if the dhcp offer has reached that tap device.
3:14 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> Hi Dan
>
> Sorry for question: what do you mean for interface vnetxxxx ?
> Currently our path is :
> eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
>
> Which one of these ?
> Moreover, reading Fabian statements about bonding limits, today I can try
to switch to a config without bonding.
"vm" is a complicated term.
`brctl show` would not show you a "vm" connected to a bridge. When you
WOULD see is a vnet888 tap device. The "other side" of this device is
held by qemu, which implement the VM.
Ok, understood and found it, vnet2
I'm asking if the dhcp offer has reached that tap device.
No, the DHCP offer packet do not reach the vnet2 interface, I can see only DHCP DISCOVER.
Roberto
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cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
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Any other use is strictly prohibited and may be unlawful.
11:13 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
>
> On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > Hi Dan
> >
> > Sorry for question: what do you mean for interface vnetxxxx ?
> > Currently our path is :
> > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
> >
> > Which one of these ?
> > Moreover, reading Fabian statements about bonding limits, today I can try
> to switch to a config without bonding.
>
> "vm" is a complicated term.
>
> `brctl show` would not show you a "vm" connected to a bridge. When you
> WOULD see is a vnet888 tap device. The "other side" of this device is
> held by qemu, which implement the VM.
Ok, understood and found it, vnet2
>
> I'm asking if the dhcp offer has reached that tap device.
No, the DHCP offer packet do not reach the vnet2 interface, I can see only DHCP DISCOVER.
Ok, so it seems that we have a problem in the host bridging.
Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
returns to the bridge, but is not propagated to the tap device.
Can you suggest how to debug this further?
11:18 a.m.
New subject: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: Dan Kenigsberg [mailto:danken@redhat.com]
Inviato: martedì 7 luglio 2015 18:13
A: NUNIN Roberto; mst(a)redhat.com
Cc: users(a)ovirt.org; ibarkan(a)redhat.com
Oggetto: Re: R: R: R: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
DHCP offer
On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> >
> > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > Hi Dan
> > >
> > > Sorry for question: what do you mean for interface vnetxxxx ?
> > > Currently our path is :
> > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
> > >
> > > Which one of these ?
> > > Moreover, reading Fabian statements about bonding limits, today I can
try
> > to switch to a config without bonding.
> >
> > "vm" is a complicated term.
> >
> > `brctl show` would not show you a "vm" connected to a bridge. When
you
> > WOULD see is a vnet888 tap device. The "other side" of this device
is
> > held by qemu, which implement the VM.
>
> Ok, understood and found it, vnet2
>
> >
> > I'm asking if the dhcp offer has reached that tap device.
>
> No, the DHCP offer packet do not reach the vnet2 interface, I can see only
DHCP DISCOVER.
Ok, so it seems that we have a problem in the host bridging.
Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
It is 3.10.0-229.7.2.el7.x86_64 on the host with installed Centos7.1, update, then vdsm
It is 3.10.0-123.20.1.el7.x86_64 on the host installed with vdsm iso
Both hosts show the issue
Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
returns to the bridge, but is not propagated to the tap device.
Can you suggest how to debug this further?
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
1:11 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> >
> > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > Hi Dan
> > >
> > > Sorry for question: what do you mean for interface vnetxxxx ?
> > > Currently our path is :
> > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- vm.
> > >
> > > Which one of these ?
> > > Moreover, reading Fabian statements about bonding limits, today I can try
> > to switch to a config without bonding.
> >
> > "vm" is a complicated term.
> >
> > `brctl show` would not show you a "vm" connected to a bridge. When
you
> > WOULD see is a vnet888 tap device. The "other side" of this device
is
> > held by qemu, which implement the VM.
>
> Ok, understood and found it, vnet2
>
> >
> > I'm asking if the dhcp offer has reached that tap device.
>
> No, the DHCP offer packet do not reach the vnet2 interface, I can see only DHCP
DISCOVER.
Ok, so it seems that we have a problem in the host bridging.
Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
returns to the bridge, but is not propagated to the tap device.
Can you suggest how to debug this further?
Dump packets including the ethernet headers.
Likely something interfered with them so the eth address is wrong.
Since bonding does this sometimes, this is the most likely culprit.
--
MST
11:13 a.m.
New subject: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: Michael S. Tsirkin [mailto:mst@redhat.com]
Inviato: mercoledì 8 luglio 2015 08:12
A: Dan Kenigsberg
Cc: NUNIN Roberto; users(a)ovirt.org; ibarkan(a)redhat.com
Oggetto: Re: R: R: R: R: R: [ovirt-users] R: PXE boot of a VM on vdsm don't read
DHCP offer
On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > >
> > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > > Hi Dan
> > > >
> > > > Sorry for question: what do you mean for interface vnetxxxx ?
> > > > Currently our path is :
> > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge -----
vm.
> > > >
> > > > Which one of these ?
> > > > Moreover, reading Fabian statements about bonding limits, today I
can try
> > > to switch to a config without bonding.
> > >
> > > "vm" is a complicated term.
> > >
> > > `brctl show` would not show you a "vm" connected to a bridge.
When
you
> > > WOULD see is a vnet888 tap device. The "other side" of this
device is
> > > held by qemu, which implement the VM.
> >
> > Ok, understood and found it, vnet2
> >
> > >
> > > I'm asking if the dhcp offer has reached that tap device.
> >
> > No, the DHCP offer packet do not reach the vnet2 interface, I can see only
DHCP DISCOVER.
>
> Ok, so it seems that we have a problem in the host bridging.
>
> Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
>
> Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
> returns to the bridge, but is not propagated to the tap device.
> Can you suggest how to debug this further?
Dump packets including the ethernet headers.
I have both tcpdump capture, on the bridge interface and on the vnet interface.
How I can upload output files ?
Sorry for probably obvious question, first time for me :)
Roberto Nunin
Likely something interfered with them so the eth address is wrong.
Since bonding does this sometimes, this is the most likely culprit.
--
MST
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
7:16 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > >
> > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > > Hi Dan
> > > >
> > > > Sorry for question: what do you mean for interface vnetxxxx ?
> > > > Currently our path is :
> > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge -----
vm.
> > > >
> > > > Which one of these ?
> > > > Moreover, reading Fabian statements about bonding limits, today I can
try
> > > to switch to a config without bonding.
> > >
> > > "vm" is a complicated term.
> > >
> > > `brctl show` would not show you a "vm" connected to a bridge.
When you
> > > WOULD see is a vnet888 tap device. The "other side" of this
device is
> > > held by qemu, which implement the VM.
> >
> > Ok, understood and found it, vnet2
> >
> > >
> > > I'm asking if the dhcp offer has reached that tap device.
> >
> > No, the DHCP offer packet do not reach the vnet2 interface, I can see only DHCP
DISCOVER.
>
> Ok, so it seems that we have a problem in the host bridging.
>
> Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
>
> Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
> returns to the bridge, but is not propagated to the tap device.
> Can you suggest how to debug this further?
Dump packets including the ethernet headers.
Likely something interfered with them so the eth address is wrong.
Since bonding does this sometimes, this is the most likely culprit.
We've ruled this out already - Roberto reproduces the issue without a
bond.
7:57 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
----- Original Message -----
On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > > >
> > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > > > Hi Dan
> > > > >
> > > > > Sorry for question: what do you mean for interface vnetxxxx ?
> > > > > Currently our path is :
> > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge
-----
> > > > > vm.
> > > > >
> > > > > Which one of these ?
> > > > > Moreover, reading Fabian statements about bonding limits, today
I
> > > > > can try
> > > > to switch to a config without bonding.
> > > >
> > > > "vm" is a complicated term.
> > > >
> > > > `brctl show` would not show you a "vm" connected to a
bridge. When
> > > > you
> > > > WOULD see is a vnet888 tap device. The "other side" of this
device is
> > > > held by qemu, which implement the VM.
> > >
> > > Ok, understood and found it, vnet2
> > >
> > > >
> > > > I'm asking if the dhcp offer has reached that tap device.
> > >
> > > No, the DHCP offer packet do not reach the vnet2 interface, I can see
> > > only DHCP DISCOVER.
> >
> > Ok, so it seems that we have a problem in the host bridging.
> >
> > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> >
> > Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
> > returns to the bridge, but is not propagated to the tap device.
> > Can you suggest how to debug this further?
>
> Dump packets including the ethernet headers.
> Likely something interfered with them so the eth address is wrong.
>
> Since bonding does this sometimes, this is the most likely culprit.
We've ruled this out already - Roberto reproduces the issue without a
bond.
To me this looks like either a regression in the host side bridging. But otoh it
doesn't look
like it's happening always, because otherwise I'd expect more noise around this
issue.
- fabian
8:15 a.m.
New subject: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
----- Original Message -----
> On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > > > >
> > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto wrote:
> > > > > > Hi Dan
> > > > > >
> > > > > > Sorry for question: what do you mean for interface vnetxxxx
?
> > > > > > Currently our path is :
> > > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------
bridge -----
> > > > > > vm.
> > > > > >
> > > > > > Which one of these ?
> > > > > > Moreover, reading Fabian statements about bonding limits,
today I
> > > > > > can try
> > > > > to switch to a config without bonding.
> > > > >
> > > > > "vm" is a complicated term.
> > > > >
> > > > > `brctl show` would not show you a "vm" connected to a
bridge. When
> > > > > you
> > > > > WOULD see is a vnet888 tap device. The "other side" of
this device is
> > > > > held by qemu, which implement the VM.
> > > >
> > > > Ok, understood and found it, vnet2
> > > >
> > > > >
> > > > > I'm asking if the dhcp offer has reached that tap device.
> > > >
> > > > No, the DHCP offer packet do not reach the vnet2 interface, I can
see
> > > > only DHCP DISCOVER.
> > >
> > > Ok, so it seems that we have a problem in the host bridging.
> > >
> > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > >
> > > Michael, a DHCP DISCOVER is sent out of a just-booted guest, and OFFER
> > > returns to the bridge, but is not propagated to the tap device.
> > > Can you suggest how to debug this further?
> >
> > Dump packets including the ethernet headers.
> > Likely something interfered with them so the eth address is wrong.
> >
> > Since bonding does this sometimes, this is the most likely culprit.
>
> We've ruled this out already - Roberto reproduces the issue without a
> bond.
To me this looks like either a regression in the host side bridging. But otoh it
doesn't look
like it's happening always, because otherwise I'd expect more noise around this
issue.
- fabian
Hard to say. E.g. forwarding delay would do this for a while.
If eth address of the packets is okay, poke at the fbd, maybe there's
something wrong there. Maybe stp is detecting a loop - try checking that.
--
MST
1:47 a.m.
New subject: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] Per conto di
Michael S. Tsirkin
Inviato: giovedì 9 luglio 2015 15:15
A: Fabian Deutsch
Cc: users(a)ovirt.org
Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't read
DHCP offer
On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
> ----- Original Message -----
> > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > > > > >
> > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto
wrote:
> > > > > > > Hi Dan
> > > > > > >
> > > > > > > Sorry for question: what do you mean for interface
vnetxxxx ?
> > > > > > > Currently our path is :
> > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------
bridge -----
> > > > > > > vm.
> > > > > > >
> > > > > > > Which one of these ?
> > > > > > > Moreover, reading Fabian statements about bonding
limits,
today I
> > > > > > > can try
> > > > > > to switch to a config without bonding.
> > > > > >
> > > > > > "vm" is a complicated term.
> > > > > >
> > > > > > `brctl show` would not show you a "vm" connected
to a bridge.
When
> > > > > > you
> > > > > > WOULD see is a vnet888 tap device. The "other
side" of this device
is
> > > > > > held by qemu, which implement the VM.
> > > > >
> > > > > Ok, understood and found it, vnet2
> > > > >
> > > > > >
> > > > > > I'm asking if the dhcp offer has reached that tap
device.
> > > > >
> > > > > No, the DHCP offer packet do not reach the vnet2 interface, I
can see
> > > > > only DHCP DISCOVER.
> > > >
> > > > Ok, so it seems that we have a problem in the host bridging.
> > > >
> > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > > >
> > > > Michael, a DHCP DISCOVER is sent out of a just-booted guest, and
OFFER
> > > > returns to the bridge, but is not propagated to the tap device.
> > > > Can you suggest how to debug this further?
> > >
> > > Dump packets including the ethernet headers.
> > > Likely something interfered with them so the eth address is wrong.
> > >
> > > Since bonding does this sometimes, this is the most likely culprit.
> >
> > We've ruled this out already - Roberto reproduces the issue without a
> > bond.
>
> To me this looks like either a regression in the host side bridging. But otoh it
doesn't look
> like it's happening always, because otherwise I'd expect more noise around
this issue.
>
> - fabian
Hard to say. E.g. forwarding delay would do this for a while.
If eth address of the packets is okay, poke at the fbd, maybe there's
something wrong there. Maybe stp is detecting a loop - try checking that.
I've the tcpdump captures, let me know if are useful to analyze.
In the VLAN interface, STP=off.
RN
--
MST
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
cancellando l'originale e ogni sua copia e distruggendo eventuali copie cartacee. Ogni
altro uso e' strettamente proibito e potrebbe essere fonte di violazione di legge.
This message is for the designated recipient only and may contain privileged, proprietary,
or otherwise private information. If you have received it in error, please notify the
sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
5 a.m.
New subject: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] Per conto di
Michael S. Tsirkin
Inviato: giovedì 9 luglio 2015 15:15
A: Fabian Deutsch
Cc: users(a)ovirt.org
Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't read
DHCP offer
On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
> ----- Original Message -----
> > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > > > > >
> > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN Roberto
wrote:
> > > > > > > Hi Dan
> > > > > > >
> > > > > > > Sorry for question: what do you mean for interface
vnetxxxx ?
> > > > > > > Currently our path is :
> > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN) ------
bridge -----
> > > > > > > vm.
> > > > > > >
> > > > > > > Which one of these ?
> > > > > > > Moreover, reading Fabian statements about bonding
limits,
today I
> > > > > > > can try
> > > > > > to switch to a config without bonding.
> > > > > >
> > > > > > "vm" is a complicated term.
> > > > > >
> > > > > > `brctl show` would not show you a "vm" connected
to a bridge.
When
> > > > > > you
> > > > > > WOULD see is a vnet888 tap device. The "other
side" of this device
is
> > > > > > held by qemu, which implement the VM.
> > > > >
> > > > > Ok, understood and found it, vnet2
> > > > >
> > > > > >
> > > > > > I'm asking if the dhcp offer has reached that tap
device.
> > > > >
> > > > > No, the DHCP offer packet do not reach the vnet2 interface, I
can see
> > > > > only DHCP DISCOVER.
> > > >
> > > > Ok, so it seems that we have a problem in the host bridging.
> > > >
> > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > > >
> > > > Michael, a DHCP DISCOVER is sent out of a just-booted guest, and
OFFER
> > > > returns to the bridge, but is not propagated to the tap device.
> > > > Can you suggest how to debug this further?
> > >
> > > Dump packets including the ethernet headers.
> > > Likely something interfered with them so the eth address is wrong.
> > >
> > > Since bonding does this sometimes, this is the most likely culprit.
> >
> > We've ruled this out already - Roberto reproduces the issue without a
> > bond.
>
> To me this looks like either a regression in the host side bridging. But otoh it
doesn't look
> like it's happening always, because otherwise I'd expect more noise around
this issue.
>
> - fabian
Hard to say. E.g. forwarding delay would do this for a while.
If eth address of the packets is okay, poke at the fbd, maybe there's
something wrong there. Maybe stp is detecting a loop - try checking that.
Someone is checking this ?
In tested config SPT was off.
RN
--
MST
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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This message is for the designated recipient only and may contain privileged, proprietary,
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Any other use is strictly prohibited and may be unlawful.
5:02 a.m.
New subject: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
On Wed, Jul 29, 2015 at 12:00:38PM +0200, NUNIN Roberto wrote:
> -----Messaggio originale-----
> Da: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] Per conto di
> Michael S. Tsirkin
> Inviato: giovedì 9 luglio 2015 15:15
> A: Fabian Deutsch
> Cc: users(a)ovirt.org
> Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't
read
> DHCP offer
>
> On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
> > ----- Original Message -----
> > > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto wrote:
> > > > > > >
> > > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN
Roberto wrote:
> > > > > > > > Hi Dan
> > > > > > > >
> > > > > > > > Sorry for question: what do you mean for
interface vnetxxxx ?
> > > > > > > > Currently our path is :
> > > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500 (VLAN)
------ bridge -----
> > > > > > > > vm.
> > > > > > > >
> > > > > > > > Which one of these ?
> > > > > > > > Moreover, reading Fabian statements about bonding
limits,
> today I
> > > > > > > > can try
> > > > > > > to switch to a config without bonding.
> > > > > > >
> > > > > > > "vm" is a complicated term.
> > > > > > >
> > > > > > > `brctl show` would not show you a "vm"
connected to a bridge.
> When
> > > > > > > you
> > > > > > > WOULD see is a vnet888 tap device. The "other
side" of this device
> is
> > > > > > > held by qemu, which implement the VM.
> > > > > >
> > > > > > Ok, understood and found it, vnet2
> > > > > >
> > > > > > >
> > > > > > > I'm asking if the dhcp offer has reached that tap
device.
> > > > > >
> > > > > > No, the DHCP offer packet do not reach the vnet2 interface,
I can see
> > > > > > only DHCP DISCOVER.
> > > > >
> > > > > Ok, so it seems that we have a problem in the host bridging.
> > > > >
> > > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > > > >
> > > > > Michael, a DHCP DISCOVER is sent out of a just-booted guest,
and
> OFFER
> > > > > returns to the bridge, but is not propagated to the tap device.
> > > > > Can you suggest how to debug this further?
> > > >
> > > > Dump packets including the ethernet headers.
> > > > Likely something interfered with them so the eth address is wrong.
> > > >
> > > > Since bonding does this sometimes, this is the most likely culprit.
> > >
> > > We've ruled this out already - Roberto reproduces the issue without a
> > > bond.
> >
> > To me this looks like either a regression in the host side bridging. But otoh
it
> doesn't look
> > like it's happening always, because otherwise I'd expect more noise
around
> this issue.
> >
> > - fabian
>
> Hard to say. E.g. forwarding delay would do this for a while.
> If eth address of the packets is okay, poke at the fbd, maybe there's
> something wrong there. Maybe stp is detecting a loop - try checking that.
Someone is checking this ?
In tested config SPT was off.
Then maybe you have a loop :)
RN
>
> --
> MST
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
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5:12 a.m.
New subject: R: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: Michael S. Tsirkin [mailto:mst@redhat.com]
Inviato: mercoledì 29 luglio 2015 12:03
A: NUNIN Roberto
Cc: Fabian Deutsch; users(a)ovirt.org
Oggetto: Re: R: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't
read DHCP offer
On Wed, Jul 29, 2015 at 12:00:38PM +0200, NUNIN Roberto wrote:
>
> > -----Messaggio originale-----
> > Da: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] Per conto
di
> > Michael S. Tsirkin
> > Inviato: giovedì 9 luglio 2015 15:15
> > A: Fabian Deutsch
> > Cc: users(a)ovirt.org
> > Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm
don't
read
> > DHCP offer
> >
> > On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
> > > ----- Original Message -----
> > > > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > > > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto
wrote:
> > > > > > > >
> > > > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN
Roberto
wrote:
> > > > > > > > > Hi Dan
> > > > > > > > >
> > > > > > > > > Sorry for question: what do you mean for
interface vnetxxxx ?
> > > > > > > > > Currently our path is :
> > > > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500
(VLAN) ------ bridge -----
> > > > > > > > > vm.
> > > > > > > > >
> > > > > > > > > Which one of these ?
> > > > > > > > > Moreover, reading Fabian statements about
bonding limits,
> > today I
> > > > > > > > > can try
> > > > > > > > to switch to a config without bonding.
> > > > > > > >
> > > > > > > > "vm" is a complicated term.
> > > > > > > >
> > > > > > > > `brctl show` would not show you a "vm"
connected to a bridge.
> > When
> > > > > > > > you
> > > > > > > > WOULD see is a vnet888 tap device. The
"other side" of this
device
> > is
> > > > > > > > held by qemu, which implement the VM.
> > > > > > >
> > > > > > > Ok, understood and found it, vnet2
> > > > > > >
> > > > > > > >
> > > > > > > > I'm asking if the dhcp offer has reached that
tap device.
> > > > > > >
> > > > > > > No, the DHCP offer packet do not reach the vnet2
interface, I can
see
> > > > > > > only DHCP DISCOVER.
> > > > > >
> > > > > > Ok, so it seems that we have a problem in the host
bridging.
> > > > > >
> > > > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > > > > >
> > > > > > Michael, a DHCP DISCOVER is sent out of a just-booted
guest, and
> > OFFER
> > > > > > returns to the bridge, but is not propagated to the tap
device.
> > > > > > Can you suggest how to debug this further?
> > > > >
> > > > > Dump packets including the ethernet headers.
> > > > > Likely something interfered with them so the eth address is
wrong.
> > > > >
> > > > > Since bonding does this sometimes, this is the most likely
culprit.
> > > >
> > > > We've ruled this out already - Roberto reproduces the issue
without a
> > > > bond.
> > >
> > > To me this looks like either a regression in the host side bridging. But
otoh it
> > doesn't look
> > > like it's happening always, because otherwise I'd expect more
noise
around
> > this issue.
> > >
> > > - fabian
> >
> > Hard to say. E.g. forwarding delay would do this for a while.
> > If eth address of the packets is okay, poke at the fbd, maybe there's
> > something wrong there. Maybe stp is detecting a loop - try checking that.
>
> Someone is checking this ?
> In tested config SPT was off.
Then maybe you have a loop :)
That was already checked, the MAC was unique in the VLAN.
RN
> RN
> >
> > --
> > MST
> > _______________________________________________
> > Users mailing list
> > Users(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
>
> Questo messaggio e' indirizzato esclusivamente al destinatario indicato e
potrebbe contenere informazioni confidenziali, riservate o proprietarie.
Qualora la presente venisse ricevuta per errore, si prega di segnalarlo
immediatamente al mittente, cancellando l'originale e ogni sua copia e
distruggendo eventuali copie cartacee. Ogni altro uso e' strettamente proibito
e potrebbe essere fonte di violazione di legge.
>
> This message is for the designated recipient only and may contain
privileged, proprietary, or otherwise private information. If you have received
it in error, please notify the sender immediately, deleting the original and all
copies and destroying any hard copies. Any other use is strictly prohibited
and may be unlawful.
Questo messaggio e' indirizzato esclusivamente al destinatario indicato e potrebbe
contenere informazioni confidenziali, riservate o proprietarie. Qualora la presente
venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
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sender immediately, deleting the original and all copies and destroying any hard copies.
Any other use is strictly prohibited and may be unlawful.
7:26 a.m.
New subject: R: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
This is a multi-part message in MIME format.
------------MIME-3653757893-462597306-delim
Content-Type: text/plain;
charset="windows-1252"
Content-Transfer-Encoding: quoted-printable
On 07/29/2015 12=3A12 PM=2C NUNIN Roberto wrote=3A
=3E=3E -----Messaggio originale-----
=3E=3E Da=3A Michael S=2E Tsirkin =5Bmailto=3Amst=40redhat=2Ecom=5D
=3E=3E Inviato=3A mercoled=EC=20=329 luglio 2015 12=3A03
=3E=3E A=3A NUNIN Roberto
=3E=3E Cc=3A Fabian Deutsch=3B users=40ovirt=2Eorg
=3E=3E Oggetto=3A Re=3A R=3A =5Bovirt-users=5D R=3A R=3A R=3A R=3A R=3A R=
=3A PXE boot of a VM on vdsm don=27t
=3E=3E read DHCP offer
=3E=3E
=3E=3E On Wed=2C Jul 29=2C 2015 at 12=3A00=3A38PM +0200=2C NUNIN Roberto wr=
ote=3A
=3E=3E=3E=3E -----Messaggio originale-----
=3E=3E=3E=3E Da=3A users-bounces=40ovirt=2Eorg =5Bmailto=3Ausers-bounces=40=
ovirt=2Eorg=5D Per conto
=3E=3E di
=3E=3E=3E=3E Michael S=2E Tsirkin
=3E=3E=3E=3E Inviato=3A gioved=EC=20=39 luglio 2015 15=3A15
=3E=3E=3E=3E A=3A Fabian Deutsch
=3E=3E=3E=3E Cc=3A users=40ovirt=2Eorg
=3E=3E=3E=3E Oggetto=3A Re=3A =5Bovirt-users=5D R=3A R=3A R=3A R=3A R=3A R=
=3A PXE boot of a VM on vdsm don=27t
=3E=3E read
=3E=3E=3E=3E DHCP offer
=3E=3E=3E=3E
=3E=3E=3E=3E On Thu=2C Jul 09=2C 2015 at 08=3A57=3A50AM -0400=2C Fabian Deu=
tsch wrote=3A
=3E=3E=3E=3E=3E ----- Original Message -----
=3E=3E=3E=3E=3E=3E On Wed=2C Jul 08=2C 2015 at 09=3A11=3A42AM +0300=2C Mich=
ael S=2E Tsirkin wrote=3A
=3E=3E=3E=3E=3E=3E=3E On Tue=2C Jul 07=2C 2015 at 05=3A13=3A28PM +0100=2C D=
an Kenigsberg wrote=3A
=3E=3E=3E=3E=3E=3E=3E=3E On Tue=2C Jul 07=2C 2015 at 10=3A14=3A54AM +0200=
=2C NUNIN Roberto wrote=3A
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E On Mon=2C Jul 06=2C 2015 at 10=3A33=3A59AM +=
0200=2C NUNIN Roberto
=3E=3E wrote=3A
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E Hi Dan
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E Sorry for question=3A what do you mean fo=
r interface vnetxxxx =3F
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E Currently our path is =3A
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E eno1 - eno2 ---- bond0 ----- bond=2E3500=
=28VLAN=29 ------ bridge -----
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E vm=2E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E Which one of these =3F
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E Moreover=2C reading Fabian statements abo=
ut bonding limits=2C
=3E=3E=3E=3E today I
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E can try
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E to switch to a config without bonding=2E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E =22vm=22 is a complicated term=2E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E =60brctl show=60 would not show you a =22vm=
=22 connected to a bridge=2E
=3E=3E=3E=3E When
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E you
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E WOULD see is a vnet888 tap device=2E The=20=
=22other side=22 of this
=3E=3E device
=3E=3E=3E=3E is
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E held by qemu=2C which implement the VM=2E
=3E=3E=3E=3E=3E=3E=3E=3E=3E Ok=2C understood and found it=2C vnet2
=3E=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E=3E=3E I=27m asking if the dhcp offer has reached t=
hat tap device=2E
=3E=3E=3E=3E=3E=3E=3E=3E=3E No=2C the DHCP offer packet do not reach the vn=
et2 interface=2C I can
=3E=3E see
=3E=3E=3E=3E=3E=3E=3E=3E=3E only DHCP DISCOVER=2E
=3E=3E=3E=3E=3E=3E=3E=3E Ok=2C so it seems that we have a problem in the ho=
st bridging=2E
=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E Is it the latest kernel-3=2E10=2E0-229=2E7=2E2=2Ee=
l7=2Ex86=5F64 =3F
=3E=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E=3E Michael=2C a DHCP DISCOVER is sent out of a just-b=
ooted guest=2C and
=3E=3E=3E=3E OFFER
=3E=3E=3E=3E=3E=3E=3E=3E returns to the bridge=2C but is not propagated to=
the tap device=2E
=3E=3E=3E=3E=3E=3E=3E=3E Can you suggest how to debug this further=3F
=3E=3E=3E=3E=3E=3E=3E Dump packets including the ethernet headers=2E
=3E=3E=3E=3E=3E=3E=3E Likely something interfered with them so the eth addr=
ess is wrong=2E
=3E=3E=3E=3E=3E=3E=3E
=3E=3E=3E=3E=3E=3E=3E Since bonding does this sometimes=2C this is the most=
likely culprit=2E
=3E=3E=3E=3E=3E=3E We=27ve ruled this out already - Roberto reproduces the=
issue without a
=3E=3E=3E=3E=3E=3E bond=2E
=3E=3E=3E=3E=3E To me this looks like either a regression in the host side=
bridging=2E But
=3E=3E otoh it
=3E=3E=3E=3E doesn=27t look
=3E=3E=3E=3E=3E like it=27s happening always=2C because otherwise I=27d exp=
ect more noise
=3E=3E around
=3E=3E=3E=3E this issue=2E
=3E=3E=3E=3E=3E - fabian
=3E=3E=3E=3E Hard to say=2E E=2Eg=2E forwarding delay would do this for a w=
hile=2E
=3E=3E=3E=3E If eth address of the packets is okay=2C poke at the fbd=2C ma=
ybe there=27s
=3E=3E=3E=3E something wrong there=2E Maybe stp is detecting a loop - try c=
hecking that=2E
=3E=3E=3E Someone is checking this =3F
=3E=3E=3E In tested config SPT was off=2E
=3E=3E Then maybe you have a loop =3A=29
=3E That was already checked=2C the MAC was unique in the VLAN=2E
=3E
=3E RN
=3E
Did you also try a reboot of the VM=3F We have the same issue with foreman=
and both Libvirt and oVirt=2E On second boot PXE boots properly from DHCP=
=2E
Haven=27t had the time to investigate yet so we=27re using mostly image
based provisioning on oVirt at the moment=2E
Met vriendelijke groet=2C With kind regards=2C
Jorick Astrego
Netbulae Virtualization Experts=20
----------------
=09Tel=3A 053 20 30 270 =09info=40netbulae=2Eeu =09Staalsteden 4-3A =09KvK=
08198180
=09Fax=3A 053 20 30 271 =09www=2Enetbulae=2Eeu =097547 TA Enschede =09BTW=
NL821234584B01
----------------
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Content-Type: text/html;
charset="utf-8"
Content-Transfer-Encoding: quoted-printable
=3Chtml=3E
=3Cbody=3E
<br <br On 07/29/2015 12:12 PM, NUNIN Roberto wrote: <br <font color=3D"#000000">>>
-----Messaggio originale----- </font><=
br <font color=3D"#000000">>> Da:
Michael S. Tsirkin [mailto:mst@<a href=
=3D"mailto:redhat.com">redhat.com</a>] </font <font
color=3D"#000000">>>>> When </font <font
color=3D"#000000">>>>>>>>>>>
I'm asking=
if the dhcp offer has reached that tap device. </font <font
color=3D"#000000">>>> In tested config SPT was
off. </fo=
nt <font color=3D"#000000">> That was
already checked, the MAC was unique i=
n the VLAN. </font Did you also try a reboot of the VM?
We have the same issue with foreman=
3;<br and both Libvirt and oVirt. On
second boot PXE boots properly from DHCP.=
3;<br <br Haven't had the time to investigate yet so we're using
mostly image <br=
based provisioning on oVirt at the moment. <br <br
<br =
=3CBR /=3E
=3CBR /=3E
=3Cb style=3D=22color=3A=23604c78=22=3E=3C/b=3E=3Cbr=3E=3Cspan style=3D=22c=
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=2C With kind regards=2C=3Cbr=3E=3Cbr=3E=3C/span=3EJorick Astrego=3C/font=
=3E=3C/span=3E=3Cb style=3D=22color=3A=23604c78=22=3E=3Cbr=3E=3Cbr=3ENetbul=
ae Virtualization Experts =3C/b=3E=3Cbr=3E=3Chr style=3D=22border=3Anone=3B=
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th=3A 130px=3Bfont-size=3A 10px=22=3EStaalsteden 4-3A=3C/td=3E =3Ctd sty=
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=3A 053 20 30 271=3C/td=3E =3Ctd style=3D=22width=3A 130px=3Bfont-size=
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------------MIME-3653757893-462597306-delim--
<br>
<font
color=3D"#000000">>> Inviato: mercoledì 29 luglio 2015
12:=
03 </font<br>
<font
color=3D"#000000">>> A: NUNIN Roberto </font<br>
<font
color=3D"#000000">>> Cc: Fabian Deutsch; users@<a
href=3D"mailt=
o:ovirt.org">ovirt.org</a> </font<br>
<font color=3D"#000000">>> Oggetto: Re: R:
[ovirt-users] R: R: R: R: =
R: R: PXE boot of a VM on vdsm don't </font<br>
<font color=3D"#000000">>> read DHCP
offer </font<br>
<font
color=3D"#000000">>> </font<br>
<font
color=3D"#000000">>> On Wed, Jul 29, 2015 at 12:00:38PM +0200,
=
NUNIN Roberto wrote: </font<br>
<font color=3D"#000000">>>>>
-----Messaggio originale----- =
</font<br>
<font
color=3D"#000000">>>>> Da: users-bounces@<a
href=3D"mailt=
o:ovirt.org">ovirt.org</a> [mailto:users-bounces@<a
href=3D"mailto:ovi=
rt.org">ovirt.org</a>] Per conto </font<br>
<font
color=3D"#000000">>> di </font<br>
<font
color=3D"#000000">>>>> Michael S.
Tsirkin </font<br>
<font
color=3D"#000000">>>>> Inviato: giovedì
9 luglio 201=
5 15:15 </font<br>
<font
color=3D"#000000">>>>> A: Fabian
Deutsch </font<br>
<font
color=3D"#000000">>>>> Cc: users@<a
href=3D"mailto:ovirt.=
org">ovirt.org</a> </font<br>
<font color=3D"#000000">>>>> Oggetto:
Re: [ovirt-users] R: R: R=
: R: R: R: PXE boot of a VM on vdsm don't </font<br>
<font
color=3D"#000000">>> read </font<br>
<font
color=3D"#000000">>>>> DHCP
offer </font<br>
<font
color=3D"#000000">>>>> </font<br>
<font
color=3D"#000000">>>>> On Thu, Jul 09, 2015 at
08:57:50AM=
-0400, Fabian Deutsch wrote: </font<br>
<font color=3D"#000000">>>>>>
----- Original Message -----&#=
13;</font<br>
<font
color=3D"#000000">>>>>>> On Wed,
Jul 08, 2015 at 09=
:11:42AM +0300, Michael S. Tsirkin wrote: </font<br>
<font
color=3D"#000000">>>>>>>> On
Tue, Jul 07, 2015 a=
t 05:13:28PM +0100, Dan Kenigsberg wrote: </font<br>
<font
color=3D"#000000">>>>>>>>>
On Tue, Jul 07, 20=
15 at 10:14:54AM +0200, NUNIN Roberto wrote: </font<br>
<font
color=3D"#000000">>>>>>>>>>>
On Mon, Ju=
l 06, 2015 at 10:33:59AM +0200, NUNIN Roberto </font<br>
<font
color=3D"#000000">>> wrote: </font<br>
<font
color=3D"#000000">>>>>>>>>>>>
Hi Dan=
</font<br>
<font
color=3D"#000000">>>>>>>>>>>> </=
font<br>
<font
color=3D"#000000">>>>>>>>>>>>
Sorry =
for question: what do you mean for interface vnetxxxx ? </font<br>
<font
color=3D"#000000">>>>>>>>>>>>
Curren=
tly our path is : </font<br>
<font
color=3D"#000000">>>>>>>>>>>>
eno1 -=
eno2 ---- bond0 ----- bond.3500 (VLAN) ------ bridge ----- </fon=
t<br>
<font
color=3D"#000000">>>>>>>>>>>>
vm.=
3;</font<br>
<font
color=3D"#000000">>>>>>>>>>>> </=
font<br>
<font
color=3D"#000000">>>>>>>>>>>>
Which =
one of these ? </font<br>
<font
color=3D"#000000">>>>>>>>>>>>
Moreov=
er, reading Fabian statements about bonding limits, </font<br>
<font
color=3D"#000000">>>>> today
I </font<br>
<font
color=3D"#000000">>>>>>>>>>>>
can tr=
y </font<br>
<font
color=3D"#000000">>>>>>>>>>>
to switch =
to a config without bonding. </font<br>
<font
color=3D"#000000">>>>>>>>>>> </font=
<br>
<font
color=3D"#000000">>>>>>>>>>>
"vm&q=
uot; is a complicated term. </font<br>
<font
color=3D"#000000">>>>>>>>>>> </font=
<br>
<font
color=3D"#000000">>>>>>>>>>>
`brctl sho=
w` would not show you a "vm" connected to a
bridge. </font><b=
r<br>
<font
color=3D"#000000">>>>>>>>>>>
you </=
font<br>
<font
color=3D"#000000">>>>>>>>>>>
WOULD see =
is a vnet888 tap device. The "other side" of this </font<br>
<font
color=3D"#000000">>> device </font<br>
<font
color=3D"#000000">>>>> is </font<br>
<font
color=3D"#000000">>>>>>>>>>>
held by qe=
mu, which implement the VM. </font<br>
<font
color=3D"#000000">>>>>>>>>>
Ok, understood=
and found it, vnet2 </font<br>
<font
color=3D"#000000">>>>>>>>>> </font><br=
<br>
<font
color=3D"#000000">>>>>>>>>>
No, the DHCP o=
ffer packet do not reach the vnet2 interface, I can </font<br>
<font
color=3D"#000000">>> see </font<br>
<font
color=3D"#000000">>>>>>>>>>
only DHCP DISC=
OVER. </font<br>
<font
color=3D"#000000">>>>>>>>>
Ok, so it seems th=
at we have a problem in the host bridging. </font<br>
<font
color=3D"#000000">>>>>>>>> </font<br>
<font
color=3D"#000000">>>>>>>>>
Is it the latest k=
ernel-3.10.0-229.7.2.el7.x86_64 ? </font<br>
<font
color=3D"#000000">>>>>>>>> </font<br>
<font
color=3D"#000000">>>>>>>>>
Michael, a DHCP DI=
SCOVER is sent out of a just-booted guest, and </font<br>
<font
color=3D"#000000">>>>>
OFFER </font<br>
<font
color=3D"#000000">>>>>>>>>
returns to the bri=
dge, but is not propagated to the tap device. </font<br>
<font
color=3D"#000000">>>>>>>>>
Can you suggest ho=
w to debug this further? </font<br>
<font
color=3D"#000000">>>>>>>>
Dump packets including=
the ethernet headers. </font<br>
<font
color=3D"#000000">>>>>>>>
Likely something inter=
fered with them so the eth address is wrong. </font<br>
<font
color=3D"#000000">>>>>>>> </font<br>
<font
color=3D"#000000">>>>>>>>
Since bonding does thi=
s sometimes, this is the most likely culprit. </font<br>
<font
color=3D"#000000">>>>>>> We've
ruled this out alrea=
dy - Roberto reproduces the issue without a </font<br>
<font
color=3D"#000000">>>>>>>
bond. </font<br>
<font
color=3D"#000000">>>>>> To me this looks
like either a=
regression in the host side bridging. But </font<br>
<font color=3D"#000000">>> otoh
it </font<br>
<font
color=3D"#000000">>>>> doesn't
look </font<br>
<font
color=3D"#000000">>>>>> like it's
happening always, be=
cause otherwise I'd expect more noise </font<br>
<font color=3D"#000000">>>
around </font<br>
<font
color=3D"#000000">>>>> this
issue. </font<br>
<font
color=3D"#000000">>>>>> -
fabian </font<br>
<font
color=3D"#000000">>>>> Hard to say. E.g.
forwarding delay=
would do this for a while. </font<br>
<font color=3D"#000000">>>>> If eth
address of the packets is o=
kay, poke at the fbd, maybe there's </font<br>
<font color=3D"#000000">>>>> something
wrong there. Maybe stp i=
s detecting a loop - try checking that. </font<br>
<font color=3D"#000000">>>> Someone is checking
this ? </font>=
<br<br>
<font
color=3D"#000000">>> Then maybe you have a loop
:) </font><=
br<br>
<font
color=3D"#000000">> </font<br>
<font color=3D"#000000">> RN </font<br>
<font
color=3D"#000000">> </font<br>
<br
9:17 a.m.
New subject: R: R: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
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--_000_8C2CD99696B62B409EBEBFDF87C83FBF59C2364C71DENU1XMAIL02p_--
2:51 p.m.
New subject: R: R: R: R: R: R: R: R: PXE boot of a VM on vdsm don't read DHCP offer
-----Messaggio originale-----
Da: Michael S. Tsirkin [mailto:mst@redhat.com]
Inviato: mercoledì 29 luglio 2015 12:03
A: NUNIN Roberto
Cc: Fabian Deutsch; users(a)ovirt.org
Oggetto: Re: R: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm don't
read DHCP offer
On Wed, Jul 29, 2015 at 12:00:38PM +0200, NUNIN Roberto wrote:
>
> > -----Messaggio originale-----
> > Da: users-bounces(a)ovirt.org [mailto:users-bounces@ovirt.org] Per conto
di
> > Michael S. Tsirkin
> > Inviato: giovedì 9 luglio 2015 15:15
> > A: Fabian Deutsch
> > Cc: users(a)ovirt.org
> > Oggetto: Re: [ovirt-users] R: R: R: R: R: R: PXE boot of a VM on vdsm
don't
read
> > DHCP offer
> >
> > On Thu, Jul 09, 2015 at 08:57:50AM -0400, Fabian Deutsch wrote:
> > > ----- Original Message -----
> > > > On Wed, Jul 08, 2015 at 09:11:42AM +0300, Michael S. Tsirkin wrote:
> > > > > On Tue, Jul 07, 2015 at 05:13:28PM +0100, Dan Kenigsberg wrote:
> > > > > > On Tue, Jul 07, 2015 at 10:14:54AM +0200, NUNIN Roberto
wrote:
> > > > > > > >
> > > > > > > > On Mon, Jul 06, 2015 at 10:33:59AM +0200, NUNIN
Roberto
wrote:
> > > > > > > > > Hi Dan
> > > > > > > > >
> > > > > > > > > Sorry for question: what do you mean for
interface vnetxxxx ?
> > > > > > > > > Currently our path is :
> > > > > > > > > eno1 - eno2 ---- bond0 ----- bond.3500
(VLAN) ------ bridge -----
> > > > > > > > > vm.
> > > > > > > > >
> > > > > > > > > Which one of these ?
> > > > > > > > > Moreover, reading Fabian statements about
bonding limits,
> > today I
> > > > > > > > > can try
> > > > > > > > to switch to a config without bonding.
> > > > > > > >
> > > > > > > > "vm" is a complicated term.
> > > > > > > >
> > > > > > > > `brctl show` would not show you a "vm"
connected to a bridge.
> > When
> > > > > > > > you
> > > > > > > > WOULD see is a vnet888 tap device. The
"other side" of this
device
> > is
> > > > > > > > held by qemu, which implement the VM.
> > > > > > >
> > > > > > > Ok, understood and found it, vnet2
> > > > > > >
> > > > > > > >
> > > > > > > > I'm asking if the dhcp offer has reached that
tap device.
> > > > > > >
> > > > > > > No, the DHCP offer packet do not reach the vnet2
interface, I can
see
> > > > > > > only DHCP DISCOVER.
> > > > > >
> > > > > > Ok, so it seems that we have a problem in the host
bridging.
> > > > > >
> > > > > > Is it the latest kernel-3.10.0-229.7.2.el7.x86_64 ?
> > > > > >
> > > > > > Michael, a DHCP DISCOVER is sent out of a just-booted
guest, and
> > OFFER
> > > > > > returns to the bridge, but is not propagated to the tap
device.
> > > > > > Can you suggest how to debug this further?
> > > > >
> > > > > Dump packets including the ethernet headers.
> > > > > Likely something interfered with them so the eth address is
wrong.
> > > > >
> > > > > Since bonding does this sometimes, this is the most likely
culprit.
> > > >
> > > > We've ruled this out already - Roberto reproduces the issue
without a
> > > > bond.
> > >
> > > To me this looks like either a regression in the host side bridging. But
otoh it
> > doesn't look
> > > like it's happening always, because otherwise I'd expect more
noise
around
> > this issue.
> > >
> > > - fabian
> >
> > Hard to say. E.g. forwarding delay would do this for a while.
> > If eth address of the packets is okay, poke at the fbd, maybe there's
> > something wrong there. Maybe stp is detecting a loop - try checking that.
>
> Someone is checking this ?
> In tested config SPT was off.
Then maybe you have a loop :)
No, it is not a loop.
I've done further tests today and finally I've defined the following conditions.
Erratic behavior is detected only within a cluster where nodes are HP Proliant BL660cGen8,
connected to Cisco Nexus 7K thru HP FEX B22 blade interconnects and Cisco Nexus 5596
switches. All nic cards are 10Gbit.
It doesn't happen with two HP Proliant DL380G5 with 10Gbit nics, connected directly to
Cisco Nexus 5548UP switches and not happen with two HP Proliant ML350eGen8 nic 1Gbit
connected to Cisco 4948 and next the same Nexus 5548UP.
All nodes are running Centos 7.1 with latest updates and all networks are configured in
the same mode, with bonding over two nic, then vlan interfaces and bridge towards VMs.
Bonding is 4 for all and works correctly with DL380 and ML350 clusters.
Well, I've tried to change the bonding mode on the BL660 cluster to mode 1 and the
issue disappear.
In all other bonding modes, it doesn't work; bridge interfaces receive DHCP offers and
do NOT reject packets, but tap interfaces aren't receiving the offer. It works only
with mode 1.
How I can investigate further ? Desiderata is to have mode 4, to aggregate available
bandwidth.
RN
> RN
> >
> > --
> > MST
> > _______________________________________________
> > Users mailing list
> > Users(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
>
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venisse ricevuta per errore, si prega di segnalarlo immediatamente al mittente,
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3181
days inactive
3286
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30 comments
6 participants
participants (6)
-
Dan Kenigsberg -
Fabian Deutsch -
Jorick Astrego -
Michael S. Tsirkin -
NUNIN Roberto -
Rik Theys