[Bridge] Election of root port

Jeff Gercken JeffG at kizan.com
Thu Aug 4 09:36:38 PDT 2005


STP root port selection is based on port priority which, by default, is
based upon the interface speed.  If they're equal I believe the lowest
port address wins.
http://www.hojmark.net/stp-port-cost.html

You're talking switches right?  Why post to a bridge list?  You'd be
better off at http://www.tek-tips.com/threadminder.cfm?pid=558

-Jeff

-----Original Message-----
From: bridge-bounces at lists.osdl.org
[mailto:bridge-bounces at lists.osdl.org] On Behalf Of sameer
Sent: Thursday, August 04, 2005 4:39 AM
To: bridge at lists.osdl.org
Subject: [Bridge] Election of root port

Hi,

I have a situation where in there are 2 switches A and B.

port 0 of A is connected to port 0 of B
port 1 of A is connected to port 1 of B

all the four ports are in auto negotiation and 100mbps

Last byte of MAC of A = 7F
Last byte of MAC of B = 7E
(remaining bytes of the MAC address are identical)

Considering the switch B will be elected as root bridge which port of
switch A will be root port.

Will this configuration work perpetually?

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