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No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0

 

 

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alan.mckay+xen at gmail

Apr 11, 2012, 1:48 PM

Post #1 of 6 (206 views)
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No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0

He folks,

I've been working on this problem for quite some time now - it is
related to my unanswered question about whether or not I need a
functioning NIC in my domU VM in order to use an iSCSI disk. Short
answer - I think so.

So I've done a considerable amount of googling and reading the last 2
days, and finally figured out how to configure dom0 xen for 2 NICs.
For the longest time I was not seeing what I was expecting to see
doing 'ifconfig' on dom0. Now I see :

eth0, eth1, lo, peth0, peth1, vif0.0, vif0.1, vifX.0, vifX.1, xenbr0, xenbr1

And I have confirmed with a CentOS 5.8 domU that the NICs are working.

But damned if I can get them working under Ubuntu 11.10. And more
googling is not getting me an answer.

Does someone have a quick link at-hand to help me out here?

This does not help - it assumes the NICs are there :
https://help.ubuntu.com/community/Xen#Network_for_DomU

I do "lshw | grep -i eth" and get nothing.

thanks,
-Alan

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davidshen84 at gmail

Apr 11, 2012, 9:10 PM

Post #2 of 6 (193 views)
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Re: No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0 [In reply to]

Hi Alan,

What does 'ifconfig -a' say in your Ubuntu domU? And what is your network
configuration for your domU? If you use NAT network for your domU, I think
you need to configure your network in your Ubuntu by manual.


On Thursday, April 12, 2012, Alan McKay wrote:

> He folks,
>
> I've been working on this problem for quite some time now - it is
> related to my unanswered question about whether or not I need a
> functioning NIC in my domU VM in order to use an iSCSI disk. Short
> answer - I think so.
>
> So I've done a considerable amount of googling and reading the last 2
> days, and finally figured out how to configure dom0 xen for 2 NICs.
> For the longest time I was not seeing what I was expecting to see
> doing 'ifconfig' on dom0. Now I see :
>
> eth0, eth1, lo, peth0, peth1, vif0.0, vif0.1, vifX.0, vifX.1, xenbr0,
> xenbr1
>
> And I have confirmed with a CentOS 5.8 domU that the NICs are working.
>
> But damned if I can get them working under Ubuntu 11.10. And more
> googling is not getting me an answer.
>
> Does someone have a quick link at-hand to help me out here?
>
> This does not help - it assumes the NICs are there :
> https://help.ubuntu.com/community/Xen#Network_for_DomU
>
> I do "lshw | grep -i eth" and get nothing.
>
> thanks,
> -Alan
>
> _______________________________________________
> Xen-users mailing list
> Xen-users [at] lists <javascript:;>
> http://lists.xen.org/xen-users
>


--
Regards,
David Shen

http://about.me/davidshen
https://twitter.com/#!/davidshen84


alan.mckay+xen at gmail

Apr 12, 2012, 6:18 AM

Post #3 of 6 (198 views)
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Re: No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0 [In reply to]

On Thu, Apr 12, 2012 at 12:10 AM, Xi Shen <davidshen84 [at] gmail> wrote:
> Hi Alan,
>
> What does 'ifconfig -a' say in your Ubuntu domU? And what is your network
> configuration for your domU? If you use NAT network for your domU, I think
> you need to configure your network in your Ubuntu by manual.

ifconfig -a just gives me my loopback

I should also mention that during the install of Ubuntu 11.10 server I
get this error :

Error while running 'modprobe -v xenbus_probe_frontend'

and then a few steps later it tells me that no network hardware was detected.
So I go back and try a manual detection and nothing. And I did try
manual config
but that does not do anything (given there really does not appear to
be HW there)

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alan.mckay+xen at gmail

Apr 12, 2012, 6:34 AM

Post #4 of 6 (194 views)
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Re: No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0 [In reply to]

On Thu, Apr 12, 2012 at 12:10 AM, Xi Shen <davidshen84 [at] gmail> wrote:
> And what is your network configuration for your domU?

I forgot to answer this - when creating the VM with virt-manager I
added both of the peth0 and peth1

And as I mentioned I did the exact same thing but with Centos5.8 in
the domU and the NICs work fine.

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alan.mckay+xen at gmail

Apr 12, 2012, 6:43 AM

Post #5 of 6 (191 views)
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Re: No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0 [In reply to]

Damn, it is an Ubuntu bug

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/857662

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alan.mckay+xen at gmail

Apr 12, 2012, 7:10 AM

Post #6 of 6 (192 views)
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Re: No NICs with Ubuntu 11.10 in domU and RHEL5.7 dom0 [In reply to]

On Thu, Apr 12, 2012 at 9:43 AM, Alan McKay <alan.mckay+xen [at] gmail> wrote:
> Damn, it is an Ubuntu bug
>
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/857662

So I downloaded the 12.04 beta2 and it has detected my NICs!

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