From: Brian (signal@xxxxxxxxxx)
Date: Wed Jun 13 2001 - 10:46:01 GMT-3
On Tue, 12 Jun 2001, Mas Kato wrote:
> 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.
Well in the example Tan was not doing RSRB or Direct DLSW, just TCP DLSW.
Perhaps thats just an "Always safe" axiom he lives by......my thing, is I
have this habit of using "1" all the time for bridges, and didn't want
that to catch me in a bind.
>
> 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)
> **Please read:http://www.groupstudy.com/list/posting.html
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