From: Nawaz, Ajaz (Ajaz.Nawaz@bskyb.com)
Date: Fri Jan 12 2007 - 13:29:35 ART
You may also want to consider utilizing the UDLD feature. Not sure exactly
if UDLD reached IEEE standards yet but I know it was in the pipeline.
<http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008
009477b.shtml>
Hth
Ajaz Nawaz
CCIE#15721
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ronnie Angello
Sent: 12 January 2007 15:53
To: fferrer10@vodafone.es
Cc: ccielab@groupstudy.com
Subject: Re: OT: avoiding layer 3 loops on misconfig blade channels
Same feature and same command but this is from the actual 6500 config
guide. Sorry, I was pressed for time before so you got the result of the
quick Google search.
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/swcg/stp_e
nha.htm#wp1020683
On 1/11/07, Ronnie Angello <ronnie.angello@gmail.com> wrote:
>
> Take a look at the Etherchannel Guard STP feature.
>
>
>
http://www.cisco.com/univercd/cc/td/doc/product/metro/me2400/12225ex/2400scg
/swstpopt.htm#wp1113708
>
>
> On 1/11/07, fferrer10@vodafone.es <fferrer10@vodafone.es> wrote:
> >
> > Hi guys:
> >
> > We have a server farm with a lot of blade servers connected to several
> > Catalyst 6500 switches through the respective blade-switches, and using
> > channeling to give extra-bandwidth to the server connections.
> >
> > Yerterday, a misconfiguration on a newly added fiber channel was
> > traduced on "merging" 2 vlans in a layer 3 loop, making the 6500 giga
> > interfaces going to very high level utilization and causing a general
> > "outage" of 15 minutes on all the server environment, not only on the
> > equipment of the 2 vlans affected by the misconfig.
> >
> > Anyone knows effective solutions to minimize the impact of these
> > misconfigs errors on critical environments? We are rate-limiting the %
of
> > bandwith allowed for broadcasts & multicasts on the core & distribution
> > links of the farm, but we don't know if there are more efficient
solutions
> > to these problems.
> >
> > Regards and TIA
> >
> > Juan
> >
> > _______________________________________________________________________
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