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02-13-2012 12:11 AM
02-13-2012 12:11 AM
Failover connection mode fail back
Hi,
Suppose we configure two external uplink ports in a failover connection mode, first one on VC1 (primary) and the second one on VC2 (secondary).
With Fast MAC Cache enable, when uplink port on VC1 fails, uplink port on VC2 switchs on active mode and sends gratuitous arp which enables the external Ethernet switches to identify the new connection (and update their MAC caches appropriately).
What's happen when uplink port on VC1 fail back ? Does it send a gratuitous arp again ?
In case of VC1 failed, what is the behavior when VC1 fail back ?
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02-15-2012 07:26 AM
02-15-2012 07:26 AM
Re: Failover connection mode fail back
the packets are not strictly gratuitous arp, VC uses a heartbeat frame as defined by HP Proliant Network Adapter Teaming white paper:
http://www.hp.com/sbso/bus_protect/teaming.pdf
The destination address of Heartbeat frames is 03-00-C7-00-00-EE