Using the Frame Control Panel > Using the Frame — Controller Settings > Configuring Redundancy > Protection Chains and Priorities > Example 1

Example 1

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 3 fails.

No backups are available (slots 2 carries the content of slot 1, which are higher priority than slot 3).