PXE boot of a VM on vdsm don't read DHCP offer

6 May 2015

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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 tha=
t 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 interfac=
e 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 fi=
ne. The issue is only related to PXE process, when it is expected to use th=
e 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.e=
l6.x86_64 on Centos6.6, this behavior is not happening, everything works fi=
ne.

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

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi all<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">We are using oVirt engine 3.5.1=
-0.0 on Centos 6.6<o:p></o:p></span></p>
<p class=3D"MsoNormal"><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"><span lang=3D"EN-US">No hosted-engine, it run on a d=
edicates VM, outside oVirt.<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">Behavior: PXE boot of a VM, end=
s in timeout (0x4c106035), instead to accept the DHCP offer coming from DHC=
P server.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Tcpdump capture started on the =
vdsm host, bond0 interface shows clearly that DHCP offers reach the vdsm in=
terfaces three times before PXE client ends in timeout.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Incoming DHCP offer is correctl=
y tagged when it comes to the bond0 interface and forwarded to the bond0.br=
idge interface.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">PXE simply ignore it. PXE versi=
on is gPXE 0.9.7.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">bond0.bridge interface is alrea=
dy setup with STP=3Doff and DELAY=3D0.<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">If we install a VM using comman=
d  line boot parameters, VM install & run fine. The issue is only =
related to PXE process, when it is expected to use the DHCP offer.<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">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.<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">On another host, under the same=
 engine, running vdsm-4.16.12-7.gita30da75.el6.x86_64 on Centos6.6, this be=
havior is not happening, everything works fine.<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">Any idea/suggestion/further inv=
estigation ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks for attention<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Best regards<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" style=3D"text-autospace:none"><span style=3D"font-si=
ze:10.0pt;font-family:Consolas;mso-fareast-language:IT">Roberto Nunin<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:10.0pt;font-family:Consolas;mso-fareast-language:IT">Infrastructure Mana=
ger<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:10.0pt;font-family:Consolas;mso-fareast-language:IT">Italy<o:p></o:p></s=
pan></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"><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>
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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
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NUNIN Roberto

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