![]() ![]() ![]() Ring purges are generally performed by an active monitor after a recovery operation, such as monitor contention, has occurred and immediately before the generation of a new token. The standby monitor is responsible for detecting an active monitor failure and starting the monitor contention process. The active monitor detects such a frame, removes it from the ring, and generates a new token. If a device that has already put a token on the network fails, the frame might continue circulating through the ring forever. One function of the active monitor is to remove any continuously floating frames from the ring. Once elected, the active monitor is responsible for resolving certain error conditions that might occur on the ring, such as lost tokens and frames, or clocking errors. The active monitor is selected based on an election process known as claim token process. This task is performed by a designated station on the ring known as the active monitor. Token Ring is designed with built-in management to constantly monitor and control the ring. ![]() Yuri Gordienko, in Sniffer Pro Network Optimization and Troubleshooting Handbook, 2002 Active Monitor ![]()
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