DLSW+ is supposed to be a method to encapsulate sna packet over IP network. 
and to do so, you need to create a virtual ring and join all the token ring 
into that ring( the Source-bridge ring-group command), DLSW will pick up  
the packet from the virtual ring and send them through the IP network.

And since most sna originate from Mainframe network which reside on Token 
Ring based network, and thus the source-route bridge command will make sense 
to bridge the token ring network to the virtual ring.
if there is no source-route bridge , won't it be a little bit misleading in 
term of why you need DLSW in the first place ?

my 0.01

Donny
CCDA CCNP



>From: "Cisco Lover" 
>Reply-To: "Cisco Lover" 
>To: [EMAIL PROTECTED]
>Subject: DLSW Confusion [7:18304]
>Date: Mon, 3 Sep 2001 08:41:49 -0400
>
>Hi guys,
>
>I am still revolving around an stupid DLSW confusion.
>I found in many 3rd party labs and other configurations that they are
>using  SOURCE-ROUTE BRIDGE x command even when configuring DLSW+ between 2
>ethernet segments..
>
>Do we really need to put  this command even when we are not dealing with
>TR??
>
>I am not agree with this....
>
>Any idea?????
>
>Thanks.
>
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