[SOLVED] Re: [Xen-users] [Pkg-xen-devel] Recent hypervisor update on Debian Wheezy breaks domU networking

2013-02-18 Thread Gavin
On 18 February 2013 16:32, Ian Campbell  wrote:

> On Mon, 2013-02-18 at 13:51 +, Gavin wrote:
>
> > 
>
> If the kernel hasn't changed and you are 100% sure the network
> configuration before and after the reboot is the same then so am I.
>
> All I can suggest is to reinstall the previous version of Xen.
>

Thanks very much for all your assistance Ian, the problem was with the
network.

We introduced  a second switch into the stack and it seems like it was our
bond interface to the switch that caused this particular issue.

We were using bond mode 5 since that works for us elsewhere and did not
think that this could be the problem since we were seeing the arp-replies
reach the host bridge interface.

As per Xen recommendations I tried mode 7 but that too did not work.

Once configured to use bond mode 1 (active-backup) this all started working
again.

Apologies for the run-around, the false accusations and also the
cross-posting, have a few hours before going live with this platform and
was under a fair amount of pressure.

All good now!!  :)

Regards,
Gavin

>
>


Re: [Xen-users] [Pkg-xen-devel] Recent hypervisor update on Debian Wheezy breaks domU networking

2013-02-18 Thread Ian Campbell
On Mon, 2013-02-18 at 13:51 +, Gavin wrote:


> I managed to get iDRAC console access and on further inspection it
> appears that grub first boots xen-4.1-amd64.gz and then the Linux
> kernel.

Correct.

> When I updated the Xen Hypervisor does it not also upgrade the
> xen-4.1-amd64.gz file ?? 

Yes. Unless the version number changes in which case you get a new file
in addition to the older version, but that doesn't apply here.

> Are there any better ways to trace where this arp reply is being lost
> apart from just tcpdump ? 

tcpdump is what I would use.

> 

If the kenrel hasn't changed and you are 100% sure the network
configuration before and after the reboot is the same then so am I.

All I can suggest is to reinstall the previous version of Xen.

Ian.



-- 
Ian Campbell
Current Noise: Karma To Burn - Thirty Five

America, how can I write a holy litany in your silly mood?
-- Allen Ginsberg


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