Re: [Xen-users] Arp not sent after live migrations on xen-unstable

[Nathan March <nathan@xxxxxxxxxxxxxxxxxxxx>]

 Thanks for the info George, I'm going to assume it's something I've 
done and start from scratch.
- Nathan

On 8/20/2010 4:45 AM, George Shuklin wrote:
> Good day.
>
> I found that newer version of kernel (2.6.34-xen) from gentoo (wich one
> is stealed somewere (suse? not sure)) adopted to debian works fine.
>
> At least within my tests (4 cycles of migration between every of 6
> testings servers) I was unable to reproduce bugs.
>
> I'll continue to tests, if I was wrong and bug still exists, I'll mail
> about this.
>
> PS Migration tested on XCP 0.5 by xe vm-migrate command.
>
> В Чтв, 19/08/2010 в 10:11 -0700, Nathan March пишет:
> > The consensus from the mailing list posts I found a while ago seemed
> > to imply that it had been fixed so I'm not clear if this is an
> > outstanding bug, a regression or just something that I'm doing wrong
> > that has broken it.
> >
> > Are there any steps I can take to debug this further and try and get
> > some more info? Cranking up the debug level on xend didn't seem to
> > result in anything useful.
> >
> > - Nathan
> >
> > On 8/18/2010 5:53 PM, George Shuklin wrote:
> > > I'm pretty concerned about this problem.
> > >
> > > Right now: I suppose, it was fixed somewhere in new netfront driver.
> > > (not checked).
> > >
> > > If no, I have few ideas about workaround. Main is an event via xen-evtch
> > > about suspending. Small module/appilcation in guest can sent a fake ARP
> > > every time it got suspend event. Other is using xenstore to send command
> > > to program from host. (both are ugly hacks).
> > >
> > > Best way is still fake ARP from netback or netfront...
> > >
> > > В Срд, 18/08/2010 в 14:22 -0700, Nathan March пишет:
> > > > Hi All,
> > > >
> > > > Having an issue with xen-4.0-unstable where after completing a live
> > > > migration, an arp is never sent out to update the switch with the new
> > > > location of the mac address.
> > > >
> > > > Network is configured as per libvirt's instructions with the xen
> > > > network-script disabled and the bridge (xenbr0) always up.
> > > > http://wiki.libvirt.org/page/Networking#Bridged_networking_.28aka_.22shared_physical_device.22.29
> > > >
> > > > Things work fine 10s after doing the migration once the switch has
> > > > picked up the move, checking the mac address tables confirms it's still
> > > > going to the old host. I've also confirmed that it's not going out at
> > > > all via a span port on the switch.
> > > >
> > > > Saw a bunch of postings a while ago regarding it, but nothing recent.
> > > > Anyone have any insight on what might be wrong?
> > > >
> > > > - Nathan
> > > >
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