From: Dale Shaw (dale.shaw@gmail.com)
Date: Sun Feb 01 2009 - 04:12:53 ARST
Hi all,
I've seen this weirdness in the real world recently with cat3750s
running 12.2(44)SE. That's odd, given the bug is allegedly fixed in
12.2(35)SE.
Exactly the same scenario. I didn't investigate further because when I
noticed it, I was in the middle of un-doing the RSPAN and modifying
the SPAN config such that both source and destination ports were on
the same physical switch.
Pretty useless workaround though.
Just did some digging. Maybe you're being bitten by CSCsl93705 instead.
cheers,
Dale
On Sun, Feb 1, 2009 at 4:51 PM, Jared Scrivener <jscrivener@ipexpert.com> wrote:
> Woot... My first suggestion matched the suggested workaround. Now if only
> I'd pretended I know the specific bug number too, then I'd be a geek. :)
>
> Cheers,
>
> Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
> Technical Instructor - IPexpert, Inc.
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: jscrivener@ipexpert.com
>
>
> -----Original Message-----
> From: Hobbs [mailto:deadheadblues@gmail.com]
> Sent: Sunday, 1 February 2009 12:49 AM
> To: jscrivener@ipexpert.com
> Cc: NET HE; szmetal@gmail.com; ccielab@groupstudy.com
> Subject: Re: RSPAN causing an l2protocol tunnel-like effect
>
> Hey, check this out. The explanation is not very descriptive, but the
> workaround is exactly as expected.
>
> CSCse90468
>
> http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fet
> chBugDetails&bugId=CSCse90468&from=summary
>
> Symptom:
> RSPAN traffic may become unidirectional or one way on a 3750/3560 that
> carries
> the RSPAN traffic ONLY.
>
> Workaround:
> Disable CDP on any device(s) adjacent to the switch port that is the
> RSPAN monitor souce.
>
> I think we got the bugger. I feel too lazy to upgrade right
> now...maybe tomorrow :)
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