From: Ronnie Royston (RonnieR@xxxxxxxxxxxxxxxxx)
Date: Tue Feb 20 2001 - 12:40:07 GMT-3
STP States are:
Forwarding
Learning
Listening
Blocking
The "forward delay" timer is the configurable amount of time that a bridge
stays in each of the STP states. In other words, Blocking state is help for
(fwd delay) seconds, then bridge port moves to listening state for (fwd
delay) seconds, and so on.
If you wish to speed up port forwarding, portfast may be the way to go, not
modifying this timer.
Practically, you should never have to modify these timers (the other related
ones are hello time and max age). If you do, only modify them at the root
bridge. The BPDUs will carry the timer info down the tree to the non-root
bridges and they will use those timers. If you manually modify some timers
and not others, some bridges will quickly move through the STP states to
forwarding while others are still listening for root bridge election info,
and things will not be good.
-----Original Message-----
From: Ron.Fuller@3x.com [mailto:Ron.Fuller@3x.com]
Sent: Tuesday, February 20, 2001 5:01 AM
To: ccielab@groupstudy.com
Subject: Spanning Tree Forward Delay
Does anyone have any good info on the set spantree fwddelay command? Does
it decrease the STP listening time? If not, what eactly does this command
do? Any real-world experience to fall on?
Thanks!
Ron Fuller, CCIE #5851, CCDP, CCNP-ATM, CCNP-Security, CCNP-Voice, MCNE
3X Corporation
rfuller@3x.com
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