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Re: [Xen-users] Problem pinging the xen guest after live migration

To: "srijavg@xxxxxxxxx" <srijavg@xxxxxxxxx>
Subject: Re: [Xen-users] Problem pinging the xen guest after live migration
From: John Haxby <john.haxby@xxxxxxxxxx>
Date: Mon, 05 Jul 2010 11:25:20 +0100
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On Sat, 2010-07-03 at 17:57 -0400, Srija G wrote:
Hi ,
[snip]
Can anyone please advice , where to check?  Do you think it is the switch 
configuration issues?


It's almost certainly a switch issue: the switch doesn't know that the MAC address for the recently migrated machine is on a different port.

There are two possibilities: you can either ping something (eg the default router) _from_ the guest after it has migrated or you can set portfast on the switch. The former just informs the switch that the originating MAC address is now on a different port; the latter makes the switch less willing to hold on to the MAC address/port association for a long time and is something that the network people can do. You might want to try doing both.

jch



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