| Interesting.
Before and after migration, run "ip link" on the hosts. See what vif device is being created for the move. When it is moved, check /proc/sys/net/ipv4/conf/<vif device>/proxy_arp. If it is not 0, this could also be related. How smart is the switch that these machines are on? Do you have access to a hub? I know they're a bit hard to get these days, but if things work with the hub, then it is probably a problem generating the gratuitous ARP for the migration.
Generally this is set up in /etc/xen/scripts/vif-bridge. I am unsure how this works for migration, but I suspect it is done the normal way. On Apr 1, 2008, at 7:01 PM, mo ther wrote:
On Tue, Apr 1, 2008 at 5:39 PM, Jayson Vantuyl < jvantuyl@xxxxxxxxxxxxxx> wrote: This could happen if the new instance got a new MAC address. Can you connect to the console and run "ip link" to see if the MAC address changes after the migration?
It definitely isn't changing.
Does anyone know what script sets up the networking once the vm has been completely transferred?
Also, are you using bridged or routed networking?
On Apr 1, 2008, at 12:37 PM, mo ther wrote:
They have the latest Redhat 5.1 packages available. On Tue, Apr 1, 2008 at 12:21 PM, Ross S. W. Walker < rwalker@xxxxxxxxxxxxx> wrote: mo ther wrote: > > Hi, > > After I live migrate a VM from one Xen host to another, the > networking on the VM stops until I do something like arping > it from a server on the same network, or login to the console > of the VM and use the network in some way (eg. ping another > server, start tcpdump, check a host name). > > I have configured the networking as per: > http://sourceware.org/cluster/faq.html#xenclustererrors > because of fencing issues. Everything works perfectly, except > that until something happens with the networking on the VM, > the networking is stopped. > > Any thoughts? I'm not sure what information to send--this is > Redhat EL5.1.
greatest versions?
-Ross
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