
DLSw Implementation Notes
114063 Rev. A 2-5
Figure 2-2. Sample DLSw and SRB Network
For mixed topologies (SRB and non-SRB LANs), an end-to-end connection path
includes an SRB and a non-SRB LAN. In such cases, do not exceed the maximum
number of SRB LAN and bridge elements allowed on the SRB LAN side of the
connection path. For detailed information on SRB, refer to Configuring Bridging
Services.
Virtual Rings
Just as each physical Token Ring in a source routing network has an associated
ring ID, the DLSw network has a virtual ring ID. You enter this ring ID with the
IP Virtual Ring parameter.
The virtual ring also has an associated maximum transmission unit (MTU) size.
The Virtual Ring MTU parameter specifies a maximum size for frames sent from
local systems to systems on remote source routing networks. Use as a value for
the MTU the smallest frame size supported on any remote source routing segment
in your network.
You can access and edit the IP Virtual Ring and Virtual Ring MTU parameters
through the DLSw Global Parameters window.
D
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S
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D
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3274
Router A
D
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D
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R
B
S
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Front End
Processer
LLC2 LLC2
Local Termination at
DLSw interfaces only
Frame Relay
(or other SRB
networks)
DSW0026A
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