Hi all, have a quick question on etherchannel, trunking and spanning tree behavior. In packet tracert I've setup 2 physical interfaces as etherchannel "po1" on each side of my switches. I then configured po1 on each side to be a trunk. This is working fine and if I shutdown a single port, the link stays active and I can still forward traffic. Perfect so far!
However, when I do a "no shut" on the downed interface, the entire etherchannel goes through a Spanning Tree initialization and takes the entire etherchannel down for approximately 30 seconds. Is this expected behavior? I thought that Spanning Tree treated the Port Channel as a single entity and as long as one physical interface were up on each side, there would be no reason for spanning tree to renegotiate?
Hum it seems you have created the port-channel first then confined the physical interfaces plus the interfaces looks like they are not are not active given the stp and ether-channel readouts
You say you need to aggregate physical port for server connection but at present the physical ports are trunked which indicates switch to switch connections -(would expect to see server porta in access mode)
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