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SRB over Frame Relay Configuration Example
Configuring Source-Route Bridging BC-151
SRB over Frame Relay Configuration Example
Figure 59 illustrates a network with the following characteristics:
• Virtual Ring Number of Router A = 100
• Virtual Ring Number of FRAD B = 200
• Virtual Ring Number of FRAD C = 300
• DLCI number for PVC between Router A and FRAD B = 30
• DLCI number for PVC between Router A and FRAD C = 31
Figure 59 FRAD Using SRB over Frame Relay to Connect to a Cisco Router
In this example, we configure a new option, conserve-ring, on the source-bridge interface
configuration command. When this option is configured, the SRB software does not add the ring
number associated with the Frame Relay PVC (the partner’s virtual ring) to outbound explorer
frames. This option is permitted for Frame Relay subinterfaces only.
The router configures the partner FRAD’s virtual ring number as the ring number for the PVC.
This approach does not require a separate ring number per DLCI. The router configures the partner
FRAD’s virtual ring number as the ring number for the PVC.
FRAD B would configure its virtual ring as 200 and the ring for the PVC as 100. FRAD C would
configure its virtual ring as 300 and the ring for the PVC as 100.
Token
Ring
10
Token
Ring
30
S6260
Token
Ring
20
Router A
FRAD B FRAD C