On the 3com(c) switches I have worked with, uplinking them with the special
$40.00 cable links them at the Backplane, and they appear to STP as a single
entity. I do not know if Cisco is the same.
-Ejay
----Original Message Follows----
From: "Adrian Chew" <[EMAIL PROTECTED]>
Reply-To: "Adrian Chew" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: 2900/3500XL Cluster Config STP
Date: Fri, 15 Sep 2000 23:37:46 -0400
Curious question - anyone knows if a clustered stack of 2900/3500s will
appear as a single STP bridge to other switches or each cluster switch
appears as a seperate bridge? I'm guessing each switch is treated as a
seperate bridge entity for the purposes of STP.
The cause of concern would be if one stacks 16 3500s using Gigastack
connectors into a cluster, and use the remaining Gig port on the top and
bottom switches as uplinks, you'd end up with a pretty large STP diameter
caused by the stacking... assuming the cluster is split right down the
middle with a port between switches 8 and 9 in blocking state, the maximum
diameter would be 17? (the 8 switches on either side plus the
distribution/core switch the stack connects to). If one tunes STP
accordingly, it would lengthen the network outages during STP convergence.
Any thoughts on this - and designs with stacks of 2900s/3500s that are
stringed one to another rather than each uplinked seperately to the uplink
switch?
Regards,
Adrian
**NOTE: New CCNA/CCDA List has been formed. For more information go to
http://www.groupstudy.com/list/Associates.html
_________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
Share information about yourself, create your own public profile at
http://profiles.msn.com.
**NOTE: New CCNA/CCDA List has been formed. For more information go to
http://www.groupstudy.com/list/Associates.html
_________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
