From: McNutt, Steve (Steve.McNutt@xxxxxxxxxxx)
Date: Tue Oct 03 2000 - 16:48:22 GMT-3
Hey, that was a pretty good explanation.. except for the Cisco markettecture
about the usefulness of TRCRFs. ;-)
In reality, MAC frames (which are comprise the bulk of your ring level
broadcast traffic) do not span the TRCRF or even enter the backplane of the
switch (switchports in the same trcrf are transparently bridged). the
microsegmentation effect occurs regardless of whether two switchports are on
the same or different trcrfs.
My experience has been that you use multiple TRCRFs because TRCRFs cannot
span switches(with the execption of the default trcrf), whereas TRBRFs can.
So if you have multiple switches that you want to be on the same ip subnet,
you need to create a TRCRF for each switch and then assign it to the same
parent TRBRF.
-----Original Message-----
From: Asbjorn Hojmark [mailto:Asbjorn@Hojmark.ORG]
Sent: Tuesday, October 03, 2000 2:57 PM
To: 'Jack Heney'
Cc: ccielab@groupstudy.com
Subject: RE: Token Ring Vlans
> If so, what advantage is gained by creating these vlans?
It's like micro-segmentation for token-ring. Remember that
stations on a ring share a token and that some frames are
local to a ring while others are global for the bridged
domain.
> Also, can rings that don't share the same parent trbrf
> communicate without some sort of routing occurring
No.
HTH,
-A
-- Heroes: Vint Cerf & Bob Kahn, Leonard Kleinrock, Robert Metcalfe Links : http://www.hojmark.org/networking/
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