Cisco Systems BC-145 manual Configuring Source-Route Bridging over Trisl, BC-151

Configuring Token Ring Inter-Switch Link

TRISL Configuration Task List

Note The default IPX encapsulation format for Token Ring in Cisco IOS routers is SAP. Therefore, you only need to explicitly configure the IPX encapsulation type if your Token Ring network requires SNAP encapsulation instead of SAP.

When routing source-routed traffic for specific VLANs, use the following additional commands in interface configuration mode:

	Command	Purpose
Step 1
	Router(config-if)# multiring	Creates a pseudoring to terminate the RIF and assign it to a VLAN.
	trcrf-vlan vlanid trcrf-ring
	ring-number
Step 2
	Router(config-if)# multiring	Enables collection and use of RIF information with routed protocols.
	{protocol-keyword [all-routes
	spanning all other]}

Configuring Source-Route Bridging over TRISL

To configure SRB over TRISL, use the following commands beginning in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# source-bridge	Configures a virtual ring for the router.
	ring-group vring-num
Step 2
	Router(config)# interface type	Specifies the subinterface on which TRISL will be used.
	slot/port.subinterface-number
Step 3
	Router(config-if)# encapsulation	Defines the encapsulation for TRISL.
	tr-isl trbrf-vlan vlanid bridge-num
	bridge-number
Step 4
	Router(config-if)# source-bridge	Attaches a TrCRF VLAN identifier to the router’s virtual ring.
	trcrf-vlan vlanid ring-group
	ring-number

Configuring Source-Route Transparent Bridging over TRISL

To configure transparent bridging over TRISL, use the following command beginning in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# interface type	Specifies the subinterface on which TRISL will be used.
	slot/port.subinterface-number
Step 2
	Router(config-if)# encapsulation	Defines the encapsulation for TRISL.
	tr-isl trbrf-vlan vlanid bridge-num
	bridge-number
Step 3
	Router(config-if)# bridge-group	Specifies the bridge group to which the TRISL subinterface belongs.
	bridge-group number

	Cisco IOS Bridging and IBM Networking Configuration Guide
78-11737-02		BC-151