[Xen-users] Migration only works one way (seemingly depending on machine's boot time)

[Dominik Klein <dk@xxxxxxxxxxxxxxxx>]

Hi

I have two completely identical machines running opensuse 10.2. domU 
(also opensuse 10.2) is running on Root NFS.
When trying to migrate this domU from machine 1 to machine 2, it works 
perfectly. When trying to migrate back to machine 1, I can see the domU 
in "xm list" on machine 1, but cannot connect to it with "xm console" 
nor ssh.
The network interface is created, but says "NO-CARRIER" and xentop shows 
100% CPU usage for this domU.
When trying to migrate this domU from machine 2 to machine 1 without 
having migrated it earlier, this fails in the same way. Migration also 
fails using xm save, copying the file manually and restoring the file on 
the other machine.
Now the (at least to me) really strange thing: After a reboot of machine 
2, the whole procedure is the other way around. I am able to migrate 
from machine 2 to machine 1, but not from machine 1 to machine 2 - 
independant of wether the vm has been migrated before or not.
This is reproducable. The machine with less uptime can migrate virtual 
machines to the other machine. The other way never works.
I compared /etc using diff -r and it showed no difference except for 
hostname, ip addresses and stuff you'd expect to be different.
Any ideas?

Regards
Dominik

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