I think one of the factors is the port priority. Three factors that
influence Root bridge port selection are: port cost, path to the root, and
port priority. I think the only one you can change is port priority. This
can be set for different values depending on the type of switch you are
running.
-----Original Message-----
From: Miller, Nathan - BSC [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 06, 2001 9:09 AM
To: [EMAIL PROTECTED]
Subject: Spanning Tree Question - Root Port Selection
I have been looking for a while for further documentation of the process by
which a switch selects its root port. Most of the books that I have
searched for this information say something similar to the following quote
from a CCO page: "A bridge's root port is the port through which the root
bridge can be reached with the least aggregate path cost, a value that is
called the root path cost." My problem is that they all seem to stop there.
My question is this. If the root path cost is the same on multiple switch
ports, how does STA determine which is the root port? Does it follow the
same course as it would when selecting a designated port (root bridge, root
path cost, sender ID, sender port).
Many thanks for your thoughts.
Nathan Miller
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