I am looking into building a high availability cluster using IPoIB for the backbone. However, I would like to be able to use gratuitous ARP replies to switch IP to MAC address mappings to effect the failover. Will this work with the OpenIB stack? What about if the hosts in question are using multicast to communicate? Will the switchover also support the addition of the new host into the correct multicast groups?

-Jay Higley

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