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

On 18 February 2013 13:40, Gavin <netmatters@xxxxxxxxx> wrote:
On 18 February 2013 12:50, Ian Campbell <ijc@xxxxxxxxxxxxxx> wrote:

Networking level stuff is all done by the dom0 (or driver domain) kernel
rather than the hypervisor so it is far more likely that a kernel level
change rather than a hypervisor change would be responsible. What kernel
version are you running? Did it also change?

This makes sense, although when I did the apt-get upgrade, there was no kernel update, however there may have been packages/drivers that required a kernel mod.

Here is the apt history which details what was upgraded when this broke:-

Upgrade: xen-hypervisor-4.1-amd64:amd64 (4.1.3-7, 4.1.3-8)

The kernel I am using is: 3.2.0-2-amd64, also tried 3.2.0-4-amd64 on another host with no success.
Would the upgrade above of xen-hypervisor-4.1-amd64 on this Debian system not cause the Dom0 kernel to be changed in any way ?? 

> 1) Please let me know if I should roll-back this particular xen
> update, kernel and all, and what those steps may be, or if this is a
> known issue with a particular workaround that I can apply.

I'd certainly be tempted to try the older kernel, assuming that was also
upgraded. It may even still be installed and in your grub menu already.

The problem is now we are using grub2 and it appears that on boot grub loads a Linux menu, then the Xen Menu with configs in /etc/grub.d/ so I'm battling to figure out how to do this.

I also do not have physical access to this host at the moment so need to set the boot order 'correctly' prior to a reboot.

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.

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

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

None of the log files are reporting back any errors and my googling just does not seem to return any useful results.

<stumped! />
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