From: phase90 (phase90@comcast.net)
Date: Tue May 13 2003 - 17:51:14 GMT-3
Kurt,
I got burned once by the auto-pruning feature a few years
back. As it turns out you need very specific images on all the different
switches or, if you don't , little things like DHCP will break. My advice is
double-check the image to be certain the pruning feature is present and,
hopefully stable.
Maybe the feature is stable in the software by now.
Jerry
----- Original Message -----
From: kurt <kurt@cybernex.net>
To: <ccielab@groupstudy.com>
Sent: Tuesday, May 13, 2003 2:47 PM
Subject: lan switching question
> I work in a large switched environment consisting
> of cat5000, 2820 , 3500xl ,2950 xl and 80 new 3550's (most of which are
being
> implemented)
>
> we recently enabled vtp pruning and had some bizarre layer two problems
that
> were helped by exempting certain affected vlans from pruning.
>
> while setting up a 2950 i saw a message stating the that the platform
only
> supports 64 spanning tree instances.
> i also previously noticed
> no spanning-tree xxxx in the affected 3500xl and 2950's
> i noticed that the no spanning-tree entries were all higher-nubered vlans.
> so the lower-end switch must start at 1 and accept the first 64 numbered
> vlans.
> i tried to manually enable and nothing happened.
>
> i went to our installed 3550's and sure enough all instances of spanning
tree
> were present and no instances were missing.
>
> i had a ticket in with tac and they were unable to pick up on this.
>
> so my question is :
> is there a document or switch support matrix for switches and
spanning-tree
> support?
> we are trying to make a case to standardize on 3550's and tac documents
> illustrating a problem would help.
> does anybody know of these limitations off hand ?
>
> thanks
>
> kurt
This archive was generated by hypermail 2.1.4 : Mon Jun 02 2003 - 15:13:41 GMT-3