Using the Frame Control Panel > Using the Frame — Controller Settings > Configuring Redundancy > Protection Chains and Priorities > Example 3

Example 3

1. The module in Slot 1 fails.

   The module in Slot 2 serves as the backup (because slot 2 is the lowest priority backup available).

2. The module in Slot 2 fails.

   The module in Slot 3 serves as the backup to Slot 1 (because slot 3 is the lowest priority backup available).

3. The module in Slot 3 fails.

No backups are available. All slots have failed and are out of service.

After module 2 is serviced, you need to manually failback module 2 in order to indicate that the module is now operational. Failure to do so will keep the module 2 marked as not available for protection operations.