Enabling Session Recovery on an In-Service System

When enabling session recovery on a system that already has a saved configuration, the session recovery commands are automatically placed before any service configuration commands in the configuration file.

To enable the session recovery feature on an in-service system, follow the procedure below. This procedure assumes that you begin at the Exec mode prompt.

Procedure


Step 1

At the Exec mode prompt, verify that the session recovery feature is enabled via the session and feature use licenses on the system by running the show license info command:

If the current status of the Session Recovery feature is Disabled, You cannot enable this feature until a license key is installed in the system.

Step 2

Use the following configuration example to enable session recovery.

configure 
   require session recovery 
   end 

This feature does not take effect until after the system has been restarted.

Step 3

Save your configuration as described in Verifying and Saving Your Configuration.

Step 4

Perform a system restart by entering the reload command:

The following prompt appears:

Are you sure? [Yes|No]: 

Confirm your desire to perform a system restart by entering yes.

The system, when restarted, enables session recovery and creates all mirrored "standby-mode" tasks, performs packet processing card reservations, and other operations automatically.

Step 5

After the system has been restarted, you should verify the preparedness of the system to support this feature as described in Viewing Session Recovery Status section.

More advanced users may opt to simply insert the require session recovery command syntax into an existing configuration file using a text editor or other means, and then applying the configuration file manually. Exercise caution when doing this to ensure that this command is placed among the first few lines of any existing configuration file; it must appear before the creation of any non-local context.