Configuring Token Ring Inter-Switch Link
TRISL Configuration Examples
BC-170
Cisco IOS Bridging and IBM Networking Configuration Guide
78-11737-02
set vlan 30 name VLAN0030 type trbrf mtu 4472 said 100030 state active bridge 0x2 stp
ieee
set vlan 22 name VLAN0022 type trcrf mtu 4472 said 100022 state active parent 20 ring 0x1
mode srt aremaxhop 7 stemaxhop 7
set vlan 23 name VLAN0023 type trcrf mtu 4472 said 100023 state active parent 20 ring
0x32 mode srt aremaxhop 7 stemaxhop 7
set vlan 32 name VLAN0032 type trcrf mtu 4472 said 100032 state active parent 30 ring 0x2
mode srt aremaxhop 7 stemaxhop 7
set vlan 33 name VLAN0033 type trcrf mtu 4472 said 100033 state active parent 30 ring
0x32 mode srt aremaxhop 7 stemaxhop 7
set port channel 1/1-2 on
set trunk 1/1 on isl 1-1005
set trunk 1/2 on isl 1-1005
add token port to crf 22
set vlan 22 5/1
add token port to crf 32
set vlan 32 5/2
TRISL with Fast EtherChannel only runs on the Cisco 7500. The MTU size can be set to more than 1500
if all the members of the port channel interface are 2FE/ISL adaptors. If, on the other hand, any member
of the port channel interface is a non 2FE/ISL adaptor, then the MTU size is not configurable and
defaults to 1500 bytes. Also, only IP utilizes all four links. Spanning Tree Protocol must be disabled if
transparent bridging is configured on the FEC. The port-channel interface is the routed interface. Do not
enable Layer 3 addresses on the physical Fast Ethernet interfaces. Do not assign bridge groups on the
physical Fast Ethernet interfaces because it creates loops. Also, you must disable Spanning Tree
Protocol if transparent bridging is configured on the FEC.
