Cisco Systems BC-145 manual BC-146

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Configuring Token Ring Inter-Switch Link

Technology Overview

TRISL support on Cisco routers provides inter-VLAN routing and bridging across a 100-Mb

Fast Ethernet link. ISL and TRISL together provide routing and bridging between Token Ring and Ethernet LANs, ELANS, and VLANs.

TRISL is supported on the following platforms with any one of the following port adapters:

Cisco 7500 or Cisco 7200 series routers

Two-port Fast Ethernet/ISL 100BaseTX

Two-port Fast Ethernet/ISL 100BaseFX

One-port Fast Ethernet 100BaseTX

One-port Fast Ethernet 100BaseFX

Cisco 4500 or 4700 series routers

NM-1FE

Cisco 3600 or 2600 series routers

NM-1FE1CE1

NM-1FE1CT1

NM-1FE1R2W

NM-1FE2CE1

NM-1FE2CT1

NM-1FE2W

NM-2FE2W

Note The two-port Fast Ethernet/ISL port adapters support frame sizes up to 17800 bytes and the one-port Fast Ethernet port adapters support a frame size of up to 1500 bytes.

TRISL provides the following capabilities and features, which will be described in the “TRISL Configuration Task List” section on page 148 and the “TRISL Configuration Examples” section on page 154:

IP routing for source-routed and non-source-routed frames between TRISL VLANs and any LAN, ELAN, or VLAN.

IPX routing for source-routed and non-source-routed frames between TRISL VLANs and any LANs, ELANs, or VLANs.

Source-Route Bridging (SRB) between TRISL VLANs and SRB-capable LANs, ELANs, or VLANs.

Source-Route Transparent Bridging (SRT) between TRISL VLANs and SRT-capable LANs, ELANs, or VLANs.

Source-Route Translational Bridging (SR/TLB) between TRISL VLANs and Ethernet LANs, ELANs, or VLANs.

Duplicate Ring Protocol (DRiP), which prevents external loops that could result if the router’s virtual ring number were duplicated elsewhere in the network.

Note VLAN Trunk Protocol (VTP) is currently not supported for TRISL on the routers.

 

Cisco IOS Bridging and IBM Networking Configuration Guide

BC-146

78-11737-02

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Contents BC-145 Cisco’s Trisl ImplementationISL and Trisl BC-146 Token Ring VLANs BC-147Configuring IP Routing over Trisl BC-148Configuring Hot Standby Router Protocol over Trisl BC-149Configuring IPX Routing over Trisl BC-150BC-151 Configuring Source-Route Bridging over TrislConfiguring Source-Route Transparent Bridging over Trisl Configuring Source-Route Translational Bridging over Trisl BC-152Monitoring Trisl Statistics BC-153Trisl Configuration Examples BC-154Following is the configuration for the router BC-155BC-156 5500BC-157 IP Routing Source-Routed Frames Between Trisl VLANs Example BC-158BC-159 Encapsulation tr-isl trbrf 999 bridge-numBC-160 BC-161 IPX Routing Source-Routed Frames Between Trisl VLANs Example BC-162SRB Between Token Ring and Trisl Vlan Example BC-163SRB Between Trisl VLANs Example BC-164BC-165 BC-166 Transparent Bridging Between Token Ring and Trisl VlanBC-167 SR/TLB Between a Trisl Vlan and an Ethernet InterfaceBC-168 Set vlan 999 type trbrf bridge 0xe stp ibmTrisl with Fast EtherChannel Example BC-169BC-170