RE: question on cat 5 and 3550

From: Edward Monk (edmonk@attbi.com)
Date: Fri Sep 13 2002 - 17:45:05 GMT-3


This is a very poorly worded question.

Is this question saying that the only time a Root link query Protocol
Data Unit is sent is when BackboneFast is configured?

I would have to disagree with that.

STP always responds to root link queries if it is enabled on the
LAN/VLAN. How screwed up would your spanning tree topology get if it
didn't?

By the way STP is enabled by default on VLAN 1 on both the 5000 and the
3550 so it would respond to Root link queries by default.

Also you can set the diameter to two on the root or secondary switch or
change the forward delay manually to twice the root delay setting and
answer this question.

In addition BackboneFast only works in certain topologies with a minimum
of three switches and it is only invoked when an indirect link failure
is detected in the STP topology.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Larson, Chris
Sent: Friday, September 13, 2002 12:40 PM
To: 'beda jain'; ccielab@groupstudy.com
Subject: RE: question on cat 5 and 3550

I believe they are asking you to enable backbone fast and set a forward
delay of 30 seconds.

Both can be found by searching CCO. Backbone fast. Forward delay.

> -----Original Message-----
> From: beda jain [SMTP:bpjain@cisco.com]
> Sent: Friday, September 13, 2002 2:01 PM
> To: beda jain; ccielab@groupstudy.com
> Subject: Re: question on cat 5 and 3550
>
> this is from routopia lab 2 section 4
> At 12:45 PM 9/13/2002 -0400, beda jain wrote:
> >Hi All,
> > configure both in cat 5 and 3550.
> >1. Configure so that switch will respond to root link queries.
> >
> >2. configure the forward delay on vlan 1 to reflect that of a
spanning
> >tree diameter of two switches.
> >
> >Thanks,
> >Beda



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