From: DAN DORTON (DHSTS68@xxxxxxxxxxxxxxx)
Date: Wed Apr 03 2002 - 14:00:26 GMT-3
The routers being on the same subnet will only work if you area doing SRT, unle
ss you specify multi-ring all to build RIF fields when you are doing SRB correc
t?
At least this is the way that I understood it.
>>> "Christopher M. Heffner" <cheffner@certified-labs.net> 04/03/02 10:28AM >>>
Remember one additional gotcha ... the bridge numbers on the 3920 are
hex values where as on the router they are decimal values by default.
On the router, you can override this behavior when do the bridge numbers
by including the bridge number with a 0x in front of the value. This
will keep all values in hex.
Example: bridge-group 0x10 would give you bridge-group 16 in your
configuration.
========================================================================
==========
Christopher M. Heffner
IMCR Course Director
Certified Cisco Systems Instructor
CCSI, CCIE, MCT, MCSE, MCNI, MCNE, CLI, PCLP, FCSE, ASE, CTT, A+
cheffner@certified-labs.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Lupi, Guy
Sent: Wednesday, April 03, 2002 10:36 AM
To: 'ccielab@groupstudy.com'
Subject: 3920 operation questions
I have a few scenarios that I want to put out there to see if my
understanding is correct:
1. If you have 2 routers, each with a token ring interface to the 3920,
and
they are placed in the same trbrf trcrf, then this is just like having
an
MAU, the routers can exchange routing information and will be on the
same IP
subnet. This is the default configuration.
2. If you have 2 routers, each with a token ring interface to the 3920,
one
is placed in trbrf15 trcrf15, and one is placed in trbrf15 trcrf16, then
the
routers will be on different ip subnets, but can do SRB. The srb
configurations would be as follows:
r1
source-bridge ring-group 12
int to0
source-bridge 15 15 12
r2
source-bridge ring-group 12
int to0
source-bridge 16 15 12
3. If you have 2 routers, each with a token ring interface to the 3920,
one
is placed in trbrf15 trcrf15, and one is placed in trbrf16 trcrf16. The
routers cannot do srb, this would be just like setting up 2 vlans on a
Catalyst switch, intervlan communication is not possible.
I appreciate any comments on this, I can set up the 3920 just fine, but
I am
trying to understand the effect that each setup has on srb and regular
traffic on the token ring segments that are attached.
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