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New Member

Tokenring Migration

Hi, we currently are migrating a tokenring / atm environment to ethernet.

A Nortel Centilion C-100 with tr/atm blades is connected to a Cisco 7204VXR via OC-3 atm interface.

The atm link is stable but as soon as the atm link is established the tokenring on the

C-100 starts to reset.

Any hints what's wrong with this config?


Re: Tokenring Migration

Often times complex troubleshooting issues are best addressed in an interactive session with one of our trained technical assistance engineers. While other forum users may be able to help, it’s often difficult to do so for this type of issue.

To utilize the resources at our Technical Assistance Center, please visit and to open a case with one of our TAC engineers, visit

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

New Member

Re: Tokenring Migration

using speedview for centillon you can see statistics.

look what kind of errors r taking place in token ring ports.

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