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Re: [Xen-users] Network Problem after DomU migration
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-users] Network Problem after DomU migration |
| From: | shreyas pandya <pandyashreyas1@xxxxxxxxx> |
| Date: | Wed, 01 Jun 2011 15:09:31 +0530 |
| Delivery-date: | Wed, 01 Jun 2011 02:41:46 -0700 |
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On Tuesday 31 May 2011 08:13 PM, Simon Hobson wrote: ml ml wrote:i have two nodes on two switches. When i do a live migration then my DomU is not reachable anymore. If i start a ping manually from the DomU console, then its reachable again. Looks like i need to create traffic so that the Dom0 Network Stack knows that there is now a DomU running :) By "reachable" i mean icmp pings to that IP Address.More likely it's a MAC table caching issue. Each switch (and that includes the virtual switch (bridge) in your Dom0) caches the MAC-port mappings required to forward packets. When you move a device, then the table need to update.Generating traffic from the DomU will generally cause the switches to update their tables - though some seem to take longer than others, I've seen HP switches take 5 minutes to expire the old mappings. why are you using two switches?should not one switch suffice for two nodes?i guess if you use one switch instead of two then the information about migrated vm will propagate to switches quickly _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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