Etherchannel Question

From: Joe Astorino (joe_astorino@comcast.net)
Date: Tue Mar 24 2009 - 19:28:16 ART


Hey guys,

I have a task here that is confusing me regarding etherchannels. The task
is exactly stated as below:

 -- Configure all switches for L2 EtherChannels on ports 19-24. Use channels
1-3 consecutively
 -- Use PagP except between SW3-SW4. PagP should not be negotiated
 -- The SW3-SW4 EC should be configured but not negotiated

So my confusion is with the 2nd point here. "Use PagP except between
SW3-SW4" -- OK easy enough. I can use mode on or LACP on that 1 link. The
confusion here is "PagP should not be negotiated". I don't get this. So
far as I understand with PagP you can have "desirable" or "auto". In
desirable mode, it negotiates and in auto mode it passively negotiates. If
I set to "on" the output of my "show etherchannel summary" shows no
protocol, even though I have seen some documentation that says "on" is a
mode of both PagP and LACP.

How can I have PagP and not negotiate at the same time?

Any help much appreciated!

Regards,

 - Joe A

"He not busy being born is busy dying" -- Dylan

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