[Users] Arp update / sendarp in case of machine movement ?

Robert Heinzmann Robert.Heinzmann at 1und1.de
Tue Jul 14 05:33:35 EDT 2009


Hello, 

I have a question regarding ARP updates. 

Network Setup: venet with proxy arp.

When movin a VE from one host to another (via DRBD: node1:shutdown,
switch drbd , node2:start) the IP/MAC combination needs to be
re-advertised so that the ARP caches are flushed. This can be done with
"sendarp". Otherwise the host is not reachable.

Is this integrated into the OpenVZ command utilities ? How can I
integrate this command that it alsways is running on: 

1) Every VE start
2) Every IP add

My Idea: 

Custom add_net and vps.mount hook scripts, however because this such a
general issue, I thing someone already found a elegang solution for this
? 

Regards, 
Robert 


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Robert Heinzmann 



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