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STP reconverges unless etherchannel port cost set

Chris Buzby
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if gig ether channel has a port cost of ? (I think 3) and one
interface fails does it still have the same port cost?

We ran into a problem on 6500's gig ether channel, where we did not
set the port cost and Spanning tree would reconverge if we pulled an
interface in the port channel group.

Just trying to figure out if it should and why it does?

Seting the port cost on the channel group removes the problem

Thanks for any ideas...

Chris Buzby
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