Etherchannel misconfig guard

Hello !

Does anyone have any experience with the Etherchannel guard misconfig
feature ?

I have a setup with 2xCat6500 running in VSS and I have a a Cat2960
connecting to both VSS nodes. Naturally, I bundle the ports to a
port-channel and create a trunk. All is working fine.
At this point I try to test the Etherchannel guard and see what happens.
I deliberately misconfigure the 2960 interfaces (set them to default
with no channel-group), and wait for some (about 5 mins) and I see no
sign of the Etherchannel Misconfig detection. Instead, a bridging loop
occured - which is expected to happen without this feature.

I am able to kind-of escape this problem by negotiating the etherchannel
(auto/desirable), but this is not what I'm trying to accomplish.

Cisco documentation doesen't help me much
Cat6500 etherchannel config guide warns about misconfig, but states no
measure to avoid.
Cat6500 spanning-tree config guide only says this feature exists and
detects misconfigured etherchannels. On most switches it seems to be
enabled by default. On my 6500 it was not.

Thanx

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Received on Sun Nov 22 2009 - 17:37:57 ART