6 p.m.
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I am working with a customer on enabling sriov within oVirt and were notici=
ng a couple of issues.
1. Whenever we assign the Number of VFs to a physical adapter in one of =
our hosts, it seems to set the mac addresses of each of the VFs to somethin=
g other than all zeros. Ex. 02:00:00:00:00:01
2. The above behavior seems to create duplicate mac addresses when we as=
sign 2 or more VFs to a guest VM. All zeros will tell the guest VM that it=
needs to set the mac. If the guest vm sees something other than all zeros=
, it will think that it was administratively assigned already and leave as =
is.
3. We were expecting oVirt to set all of the MAC addresses of the VFs in=
itially to all zeros. Then when we assign these VFs to the guest VM, the g=
uest VM will assign a unique MAC to each of the VFs.
4. Please note that we are assigning the VF to the guest VM by adding a =
Host Device (the specific pci host device for the VF). This seems to be di=
fferent than your docs which shows adding a Network Interface with type PCI=
Passthrough.
5. If we manually run the following command from an ssh session: echo 4=
t:
469.556.6042
www.ixiacom.com<http://www.ixiacom.com/
[cid:image002.png@01D2DA11.7BFEC8C0]
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</head <body lang=3D"EN-US"
link=3D"#0563C1" vlink=3D"#954F72" <div
class=3D"WordSection1" <p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">I am working with a customer on enabling sriov within oVirt and we=
re noticing a couple of issues.<o:p></o:p></p <ol
start=3D"1" type=3D"1" <li
class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;mso-list:l0 level1 lfo1" Whenever
we assign the Number of VFs to a physical adapter in one of our ho=
sts, it seems to set the mac addresses of each of the VFs to something othe=
r than all zeros. Ex. 02:00:00:00:00:01<o:p></o:p></li><li
class=3D"M=
soNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-l=
ist:l0 level1 lfo1" The above behavior seems to create
duplicate mac addresses when we assign 2=
or more VFs to a guest VM. All zeros will tell the guest VM that it =
needs to set the mac. If the guest vm sees something other than all z=
eros, it will think that it was administratively
assigned already and leave as is.<o:p></o:p></li><li
class=3D"MsoNormal" s=
tyle=3D"mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 leve=
l1 lfo1" We were expecting oVirt to set all
of the MAC addresses of the VFs initiall=
y to all zeros. Then when we assign these VFs to the guest VM, the gu=
est VM will assign a unique MAC to each of the
VFs.<o:p></o:p></li><li clas=
s=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;mso-list:l0 level1 lfo1" Please note that we are assigning
the VF to the guest VM by adding a Host D=
evice (the specific pci host device for the VF). This seems to be dif=
ferent than your docs which shows adding a Network Interface with type PCI =
Passthrough.<o:p></o:p></li><li class=3D"MsoNormal"
style=3D"mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1" If we manually run the following command from an ssh
session: <b><spa=
n style=3D"font-size:10.0pt;color:#0070C0">echo 4 >
/sys/class/net/ens4f=
0/device/sriov_numvfs</span></b><o:p></o:p></li></ol <p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt">it will set all of the
VFs mac ad=
dresses to all zeros. Then when we assign the pci host device to the =
guest VM through oVirt, it creates unique macs
for both vnics. However, when we reboot the Host, it seems to revert=
back to the oVirt assigned macs of
02:00:00:00:00:01.</span><o:p></o:p></p=
<p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Do know why this might be happening? Should we be assigning =
the VFs to the guest VM by adding a network interface with type PCI Passthr=
ough? Ultimately our goal is to enable sriov
within oVirt and be able to assign multiple VFs to the guest VMs with each=
getting a unique mac. We also want to do the vlan tagging via an app=
lication running on the guest VM (not at the Host level.)<o:p></o:p></p <p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Thank you for any help,<o:p></o:p></p <p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">jp<o:p></o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p
class=3D"MsoNormal"><o:p> </o:p></p <p class=3D"MsoNormal"
style=3D"mso-margin-top-alt:6.0pt;margin-right:0in;m=
argin-bottom:8.0pt;margin-left:0in;line-height:105%"
<b><span
style=3D"font-size:10.0pt;line-height:105%;font-family:"Arial=
",sans-serif;color:#37B0C9">Joe Paolicelli (JP)<br </span></b><span
style=3D"font-size:10.0pt;line-height:105%;font-family:&qu=
ot;Arial",sans-serif;color:#5F6369;letter-spacing:.4pt">Virtualization=
Specialist, Ixia Solutions Group<br Keysight
Technologies<o:p></o:p></span></p <p
class=3D"MsoNormal"><span
style=3D"font-size:10.0pt;font-family:"Ar=
ial",sans-serif;color:#37B0C9">e:</span><span
style=3D"font-size:10.0p=
t;font-family:"Arial",sans-serif;color:#5F6369" </span><u><span
style=3D"font-size:12.0pt;font-family:"Arial",san=
s-serif;color:#0563C1"><a
href=3D"mailto:jp@keysight.com">jp@keysight.com</=
a></span></u><span
style=3D"font-size:10.0pt;font-family:"Arial",=
sans-serif;color:#5F6369"><br
</span><span
style=3D"font-size:10.0pt;font-family:"Arial",sans-s=
erif;color:#37B0C9">t:</span><span
style=3D"font-size:10.0pt;font-family:&q=
uot;Arial",sans-serif;color:#5F6369"> 469.556.6042<br </span><a
href=3D"http://www.ixiacom.com/"><span style=3D"font-size:10.0pt;=
font-family:"Arial",sans-serif;color:#37B0C9">www.ixiacom.com</sp=
an></a><o:p></o:p></p <p
class=3D"MsoNormal"><u><span
style=3D"font-size:10.0pt;font-family:"=
;Arial",sans-serif;color:#37B0C9;letter-spacing:1.0pt"><br </span></u><img border=3D"0"
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class=3D"MsoNormal"><o:p> </o:p></p </div
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--_004_CO1PR17MB074340FDFE652923C0697FB1F9A20CO1PR17MB0743namp_--
/sys/class/net/ens4f0/device/sriov_numvfs
it will set all of
the VFs mac addresses to all zeros. Then when we assign=
the pci host device to the guest VM through oVirt, it creates unique macs =
for both vnics. However, when we reboot the Host, it seems to revert back =
to the oVirt assigned macs of 02:00:00:00:00:01.
Do know why this might be happening? Should we be assigning the VFs to the=
guest VM by adding a network interface with type PCI Passthrough? Ultimat=
ely our goal is to enable sriov within oVirt and be able to assign multiple=
VFs to the guest VMs with each getting a unique mac. We also want to do t=
he vlan tagging via an application running on the guest VM (not at the Host=
level.)
Thank you for any help,
jp
Joe Paolicelli (JP)
Virtualization Specialist, Ixia Solutions Group
Keysight Technologies
e: jp@keysight.com<mailto:jp@keysight.com
1:56 p.m.
Hi Joe,
First of all, if you using the SR-IOV feature, you should use it only as
pci-passthrough vNICs only. Not as host-devices.
Our documentation is correct and is says : "adding a Network Interface with
type PCI Passthrough"
When enabling VFs on the host level, the expected MAC address for the VFs
is 02:00:00:00:00:01 and that is the correct behaviour.
Once you will create a network with 'passthrough' vNIC profile and then add
this as a vNIC to the guest VM, once the guest will run, you will see that
each pci-passthrough vNIC got it's own unique MAC address. No matter how
much VFs you are using, each pci-passthrough vNIC will get it's own MAC
address.
For vlan, you can create the network(passthrough) with the desired vlan tag
and it will be passed to the guest on run VM.
Cheers)
On Thu, Mar 29, 2018 at 6:00 PM, <joe.paolicelli(a)keysight.com> wrote:
I am working with a customer on enabling sriov within oVirt and were
noticing a couple of issues.
1. Whenever we assign the Number of VFs to a physical adapter in one
of our hosts, it seems to set the mac addresses of each of the VFs to
something other than all zeros. Ex. 02:00:00:00:00:01
2. The above behavior seems to create duplicate mac addresses when we
assign 2 or more VFs to a guest VM. All zeros will tell the guest VM that
it needs to set the mac. If the guest vm sees something other than all
zeros, it will think that it was administratively assigned already and
leave as is.
3. We were expecting oVirt to set all of the MAC addresses of the VFs
initially to all zeros. Then when we assign these VFs to the guest VM, the
guest VM will assign a unique MAC to each of the VFs.
4. Please note that we are assigning the VF to the guest VM by adding
a Host Device (the specific pci host device for the VF). This seems to be
different than your docs which shows adding a Network Interface with type
PCI Passthrough.
5. If we manually run the following command from an ssh session: *echo
4 > /sys/class/net/ens4f0/device/sriov_numvfs*
it will set all of the VFs mac addresses to all zeros. Then when we
assign the pci host device to the guest VM through oVirt, it creates unique
macs for both vnics. However, when we reboot the Host, it seems to revert
back to the oVirt assigned macs of 02:00:00:00:00:01.
Do know why this might be happening? Should we be assigning the VFs to
the guest VM by adding a network interface with type PCI Passthrough?
Ultimately our goal is to enable sriov within oVirt and be able to assign
multiple VFs to the guest VMs with each getting a unique mac. We also want
to do the vlan tagging via an application running on the guest VM (not at
the Host level.)
Thank you for any help,
jp
*Joe Paolicelli (JP) *Virtualization Specialist, Ixia Solutions Group
Keysight Technologies
e: *jp(a)keysight.com <jp(a)keysight.com>*
t: 469.556.6042 <(469)%20556-6042>
www.ixiacom.com
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Michael Burman
Senior Quality engineer - rhv network - redhat israel
Red Hat
<https://www.redhat.com>
mburman(a)redhat.com M: 0545355725 IM: mburman
<https://red.ht/sig>
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Michael Burman