Etherchannel setup

Does anybody know Cisco's official recommendation for the PAgP mode for establishing etherchannel links? Is it 'desirable' on both ends?

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It ought to be in most cases. Remember that bpdu will not use other links in the bundle unless desirable is used.

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Hansang Bae

did not get the point of this could u explain? thanks on paga u nomaly use one side auto the other desirable not? greez colin

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Colin Cant

I could but Clark is much better than me

"Utilize the 'desirable' EtherChannel mode for maximum Spanning Tree stability. When using the on mode, it is possible for the entire channel to be declared down when only the single link carrying STP failed."

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