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pagp and etherchannel

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iwanthome

Technical User
Mar 9, 2003
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CN
Cisco said pagp can setup etherchannel automatically . But how ?
I connect two switch with 2 cable,and it can't form etherchannel.
I remember dtp can form trunk if I connect two switch without config trunk manully.
If I code "channel 1 mode desirable",etherchannel will establish success.So what's the mean of setup etherchannel automatically ? And what's the difference between pagp learn-method and pagp port-priority and port-channel load-balance?
thanks!
 
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