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peculiar etherchannel issue
1) Changed ‘em 2) Changed SFPs and tried different ports 3) Haven’t tried that yet 4) Tried it, same result with only a single link
—– Original Message —- From: “Todd, Douglas M.” To: Shine Joseph ; SCOTT PENDLETON ; ccielab@groupstudy.com Sent: Thursday, April 10, 2008 4:51:44 PM Subject: RE: peculiar etherchannel issue
Ideas:
1) Bad cables or cable 2) Fiber/TX 3) make sure there is no udld enabled (just to make sure) (global etc). 4) Try port channel with one interface configured on both sides. See if this works.
Here is what I do to remove the problem (besides what’s mentioned above) : shut all interfaces down. configure the port channel. bring one side up. bring the other side up.
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Shine Joseph Sent: Thursday, April 10, 2008 4:17 PM To: ‘SCOTT PENDLETON’; ccielab@groupstudy.com Subject: RE: peculiar etherchannel issue
My initial troubleshooting would hover around spanning tree issues. LOOPS, ROOT etc…
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of SCOTT PENDLETON Sent: Friday, 11 April 2008 5:06 AM To: ccielab@groupstudy.com Subject: peculiar etherchannel issue
I have two identically configured 6500s with the same IOS code. If I configure a two port ether-channel with either LACP or PAGp to a remote switch with the first 6500 everything works fine. If I do it with the second 6500 the port-channel interface comes up and stays up for about a minute before the remote switch detects an etherchannel misconfiguration and puts both ports into err-disabled state. I’ve tried it with three different remote switches and I get the same result. It works with the one 6500, but not the other. If I clear the error the link comes back up but repeats the same process. I’ve tried different physical ports on the 6500, same result. Has anyone seen anything like that before?
Scott P.
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