From: Cliff Stewart (cliftonlstewart@xxxxxxxx)
Date: Wed May 03 2000 - 18:00:23 GMT-3
Kinton,
What about that token ring talking to other token ring segments. Look at
the following line...
interface TokenRing0
ip address 137.20.30.1 255.255.255.0
ring-speed 16
source-bridge 1 1 10<----------- Go from physical ring 1 to bridge 1
to logical ring 10
source-bridge spanning
If you didn't have the source-bridge ring-group 10 command other
token-ring segments wouldn't be able to forward traffic to reach your
physical ring 1. At least this is the way I've always understood it:)
Clifton Stewart-CCNA, CCIE Candidate
Kinton Connelly wrote:
>
> Ok, so I'm going back through some of the CCIE Boot Camp labs and on lab 3,
> it wants me to establish a DLSW+ connection between R2's ethernet0 and R3's
> tokenring0. No problem. Here's how I'd do it:
>
> R2
> --
> dlsw local-peer peer-id 137.20.100.2
> dlsw remote-peer 0 tcp 137.20.3.33
> dlsw bridge-group 1
> !
> interface Ethernet0
> ip address 137.20.20.1 255.255.255.0
> bridge-group 1
>
> R3
> --
> source-bridge ring-group 10
> dlsw local-peer peer-id 137.20.3.33
> dlsw remote-peer 0 tcp 137.20.100.2
> dlsw bridge-group 1
> !
> interface TokenRing0
> ip address 137.20.30.1 255.255.255.0
> ring-speed 16
> source-bridge 1 1 10
> source-bridge spanning
>
> This config seems to work just fine - the circuits get all set up and seem
> to be happy. But then I reviewed the solution configs and they added this
> one line to R2 (right above the first dlsw entries):
>
> source-bridge ring-group 10
>
> Can someone please give me a sanity check on this? I didn't think you
> needed a "source-bridge ring-group" command for DLSW+ if you were using
> ethernet interfaces - I thought all you needed was the "dlsw bridge-group
> x" command.
>
> I just read through the CCO docs on this and couldn't find a straight
> answer - one of their examples uses the "source-bridge ring-group x"
> command on an ethernet-only router, but that's in the context of SR/TLB.
>
> Ok...wait a minute...I just did a little more searching. In the "Designing
> DLSw+ Internetworks" guide:
>
> <http://www.cisco.com/univercd/cc/td/doc/cisintwk/idg4/nd2007.htm>
>
> there is a similar example - and they don't use the "source-bridge
> ring-group x" command. So now I'm even more confused. Any takers?
>
> Thanks,
>
> Kinton
>
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