Virtual Connect and HP A-Series switches (A5820) IRF Integration Guide

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IRF link failure
VM1 has a continuous ping to its default GW 192.168.1.1. Under normal conditions, the vSwitch
hashes the traffic from this VM to the vmnic3, which is mapped to the VC2 and then enters the Bridge-
Aggregation3 interface in the IRF logical switch.
The test issued a shut down command under switch1 A5820 IRF1/2 to simulate IRF link failure.
Test Result:
 Shut irf-port 1/2: Ping packet loss did not occur, so the convergence time was less than one
second.
 No shut irf-port 1/2: About one second packet loss after switch 2 rebooted and came back up to
join the IRF domain
Note:
Upon losing the IRF link, MAD initiates and elects one master for the domain, and the other switch
(switch 2 with lower IRF priority) shuts down all its local interfaces to prevent a dual active (split brain)
scenario. When the IRF link is restored, switch 2 reboots itself and rejoins the IRF domain.
Packet loss when Switch2 (A5800) came back and joined IRF domain: