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Re: [Xen-users] Network Problem after DomU migration
| To: | ml ml <mliebherr99@xxxxxxxxxxxxxx>, Xen-users@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-users] Network Problem after DomU migration |
| From: | Simon Hobson <linux@xxxxxxxxxxxxxxxx> |
| Date: | Tue, 31 May 2011 15:43:50 +0100 |
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| Delivery-date: | Tue, 31 May 2011 08:31:51 -0700 |
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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. -- Simon Hobson _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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