Cisco Catalyst 5000 Series Switches

Field Notice: Catalyst 5000 Token Ring, Source-Route, and Multiring Traffic Will Not Establish Through RSM

November 19, 1999

Products Affected




WS-X5302 68-0316-07



WS-X5030= WS-X5030

Catalyst 5000 Copper Token Ring Switching Module (16 port)


WS-X5031= WS-X5031

Catalyst 5000 Fiber Token Ring Switching Module (16 port)


Problem Description

Token Ring VLAN traffic from the Catalyst 5000 Route Switch Module (RSM) module fails to be forwarded toward Token Ring module ports.


The Catalyst 5000 Supervisor software is incorrectly discarding Token Ring and Source-Routed frames that are coming from VLANs attached to the RSM and are destined to Token Ring ports in the same chassis.

This problem first occurs in the Catalyst 5000 Supervisor software release 5.2(1).

Problem Symptoms

Connectivity from devices on VLANs connected via the RSM to Source-Route bridged devices connected to the Token Ring ports within the chassis will not be achieved.


There is no workaround to this problem.

The software fix is available in the Catalyst 5000 Supervisor interim software release 5.2(1.4). If needed, Cisco's Technical Assistance Center (TAC), will be able to provide you with the latest interim software containing this fix.

The Catalyst 5000 Supervisor software maintenance release 5.2(2) is targeted for release to CCO for the beginning of December 1999 and will also contain this fix.


To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

View bug details for CSCdp21155 (registered customers only) .

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods: