RE: dlsw+ bet/ an enet rtr t/r rtr [7:46896]

[Richard Botham]

Timur,
Firstly, the source-bridge transparent is only needed when you have a
router with both Token ring and ethernet interfaces

Secondly, the source-bridge ring-group 500 command on the router with no
token ring interfaces will do nothing - You are transparently bridging on
this router!

Thirdly, to accomodate more than two rings on a router you need this virtual
ring. This is a limitation of the chips used in the routers.
Have a look at this link: (Watch the wrap)
I found this really useful - Solie book has some good srb and dlsw stuff too!

http://www.cisco.com/univercd/cc/td/doc/product/software/ssr83/rpc_r/53999.htm


HTH 
Richard




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Re: dlsw+ bet/ an enet rtr t/r rtr [7:46896]

[[EMAIL PROTECTED]]

The source-bridge transparent command is only needed if 
you are bridging between the token-ring and ethernet on 
the same router.  It is not needed if you are using 
dlsw to peer between, for instance, R1 token and R2 
ether AND R1 ether and R3 ether/token.

The virtual ring is not required on the EN router.  
Some configs had this on CCO but it doesn't do anything.
If there is no token-ring interface on the router, a 
virtual ring is not needed, but the dlsw bridge-group 
is.


Your understanding is correct.
 two questions...thx in advance!
 
 1. is the source-bridge transparent command required on the token ring
 router when one dlsw peer is ethernet only  the other dlsw peer is token
 ring only (i.e., bet/ r1-e1  r2-to1)?
 
 2. why is the virtual ring (500) required on the ethernet router in the
 config below?
 
 finally, i understand that in the following config, the source-bridge
 transparent command is required bec/ ethernet  token ring is off the same
 router
 
 !ethernet router:
 
 source-bridge ring-group 500
 dlsw local-peer peer-id 1.1.1.1
 dlsw remote-peer 0 tcp 2.2.2.2 lf 1500
 dlsw bridge-group 5
 bridge-group 5 protocol ieee
 !
 int e0
 ip address 1.1.1.1 255.255.255.0
 bridge-group 5
 
 !ethernet/token ring router:
 
 source-bridge ring-group 500
 source-bridge transparent 500 1000 1 5
 dlsw local-peer peer-id 2.2.2.2
 dlsw remote-peer 0 tcp 1.1.1.1 lf 1500
 dlsw bridge-group 5
 bridge-group 5 protocol ieee
 !
 int e1/2
 ip address 2.2.2.2 255.255.255.0
 bridge-group 5
 !
 int to0
 ring-speed 16
 source-bridge 7 1 500
 source-bridge spanning
 
 Timur Mirza
 Principal Network Engineer
 Network Planning  Engineering, West Region
 15505-B Sand Canyon Avenue
 Irvine, California 92618
 Verizon Wireless
 949.286.6623 (o)
 949.697.7964 (c)




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