I have a pair of 6509s with an Etherchannel forming a layer 2 trunk between them. The trunk carries 3 VLANs. HSRP is used to failover layer 3 routing between the two switches.
When I change the broadcast suppression levels on either the physical interfaces or the port-channel interface, I see HSRP fail the router over and then fail it back about 30s later. There are also messages logged about the Etherchannel breaking down because its two member ports have incompatible broadcast suppression levels. This happens even if I use:
# conf t
# int portChannel 2
# storm broad level 1
and let the switch push the configuration change out to the individual physical ports. I also get a second portChannel 2 interface (called portChannel 2A) formed in some cases.
I don't think I'm taking a serious hit here, but I'm surprised there is any hiccup at all.
Anyone got any experience with something like this?
