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I don't think that the kernel should affect the live migration. Can you try to live migrate from the cli using xm migrate -l <guest uid> <target host> and post the results?
I try to migrate with xm command but the problem not disappear .
The xm command not give any result code. it finished correctly, by the way or we lost 3-10% of packets or stop pinging .
[root@******** ~]# xm migrate -l ****UUID*** ****SERVER_OVS_NAME***
[root@******** ~]# echo $?
Now the server have both the new kernel, but it continues to have the problem. The strange thing is that if you return to previous server OVS, the pinging restart, sometime.
Take a look at the ovs-agent log and the xend.log. If there is anything strange going on, it will likely be mentioned there. This looks a bit like some strange networking issue.
This sounds like your network/VLAN group stuff is mismatched between your OVM hosts.. If the machine migrates, but doesnt talk on the network or talks intermittenly I would immediately start looking at the networking config on the destination server (both from a NIC conf and switch port config)