Cisco D9859 Installation And Configuration Manual page 31

Disaster Recovery
If the acquisition fails or there is no signal lock on the Backup 1 transport, the
receiver will continue to search for the next backup transport for PE1 (Backup 2
transport). If the acquisition is successful on the Backup 2 transport, the receiver will
set PE1 to channel 101, but leave PE2 to channel 2 because PE2 is not specified for
Backup 2 transport.
If the acquisition fails or there is no signal lock on the Backup 2 transport, it will
continue the search path and set PE1 to channel 801 and PE2 to channel 1005 if the
acquisition is successful on the Backup 3 transport. However, if the acquisition fails
or there is no signal lock on the Backup 3 transport, the search path will continue to
the origin transport. The search path will cycle through origin, Backup 1, Backup 2,
and Backup 3 infinitely.
The search path is shown in the Disaster Recovery Status information on the front
panel and web GUI.
By default, the disaster recovery is enabled. To set up and view the disaster recovery
parameters using the front panel, see Setup Menu: DR (on page 121) and Status
Menu - DR (on page 53). To set up and view the disaster recovery parameters using
the web GUI, see Configuring the Disaster Recovery Settings (on page 154) and
Viewing the Disaster Recovery Status (on page 157).
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