From: Mas Kato (tealp729@xxxxxxxx)
Date: Wed Jun 13 2001 - 03:18:43 GMT-3
In the example given, unique bridge numbers would really only be
necessary if ring 34 was physically the same ring attached to both
routers and DLSW+ was doing RIF passthru (or RSRB was used instead of
DLSW+).
Since a RIF is composed of ring-bridge-ring triples and the ring number
must be unique throughout a given SRB network, the only time bridge
numbers off of a given ring must be unique is when they are in parallel,
joining the same rings.
Mas
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Brian
Sent: Tuesday, June 12, 2001 8:28 PM
To: ccielab@groupstudy.com
Subject: An SRB question...
I am reading in Tan Nam-Kee's bridging book, where
he has a DLSW/SRB configs as follows:
Router 4
source-bridge ring-group 73
dlsw local-peer peer-id 170.34.34.130 cost 2 promiscuous
dlsw ring-list 1 rings 34
dlsw remote-peer 1 tcp 170.34.34.129
!
interface TokenRing0/0
source-bridge 34 1 73
source-bridge spanning
!
Router 3
source-bridge ring-group 73
dlsw local-peer peer-id 170.34.34.129 cost 4 promiscuous
dlsw ring-ist 1 rings 34
dlsw remote-peer 1 tcp 170.34.34.130
!
interface TokenRing0
source-bridge 34 2 73
source-bridge spanning
Ok, Tan says "The bridge number defined for R3's TO0/0 is
1 and for R4's TO0 is 2. This is to prevent loops, since
the Token Ring interfaces of both R3 and R4 are physically
connected to the same ring."
Now if this is the way things should be, thats great, I
can work like that. But *alot* of configs I see, including
Fatkid 441 Advanced DLSW, use the same bridge number on routers
sharing the same physical ring (Fatkid does this on R4 and R3
in the DLSW lab, both use the same bridge and virtual ring.
Anyone care to comment?
Brian
-----------------------------------------------
Brian Feeny e:signal@shreve.net
CCNP+Voice/ATM/Security p:318.222.2638x109
CCDP f:318.221.6612
Network Administrator
ShreveNet Inc. (ASN 11881)
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