LACP vs ON in etherchannels

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Mar 13th, 2006
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I know how to configure the etherchannels, but would like to know why LACP over just setting it ON manually. PAgP is not an option, but if there is a reason for that over the others it would be nice to know as well. I intend to have the etherchannels on between 3750s and 6506's and between two 6506's. I favor "manual ON" unless you have a better reason. thanks, Karen

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Prashanth Krishnappa Mon, 03/13/2006 - 06:31
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It is always a good idea to negotiate a channel(PAGP or LACP) rather than forcing it to ON. This is because if for some reason, a channel cannot be brought up, if the channel would be torn down if it is being negotiated avoiding potential STP loops. It is in our best pratices document as well

http://www.cisco.com/en/US/customer/products/hw/switches/ps663/products_tech_note09186a0080094713.shtml#etherchan

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