Preparing the T640 Router for Graceful Switchover

If you are integrating an operational T640 router with the TX Matrix router, you must prepare the T640 router for graceful switchover. If you are integrating an offline T640 router with the TX Matrix router, this procedure is optional.

Note: We recommend that you run Junos OS Release 7.3 or later on the TX Matrix router to support graceful switchover.

1. Verify that graceful switchover is enabled on the T640 router by displaying its configuration at the [edit chassis redundancy graceful-switchover] hierarchy level:
   user@host> show configuration chassis redundancy graceful-switchover

   traceoptions {
       flag update;
   }
   enable;
   

   If graceful switchover is not enabled, enable it in configuration mode as follows:

   user@host# set chassis redundancy graceful-switchover enable

   For more information about graceful switchover, see the Junos OS System Basics Configuration Guide .

2. Verify the state of the Packet Forwarding Engines by issuing the show pfe terse command on the master and backup Routing Engines.

   Verify that the State field of each Packet Forwarding Engine and the backup Routing Engine is Online.

   user@host> show pfe terse

   Slot Type Slot      State     Uptime
    0   GFPC Present   Online    03:46:19
    1   RE   Present   Online    03:47:09
   

3. Verify that the State field of each Packet Forwarding Engine is Valid.
   user@host> request routing-engine login other-routing-engine
   % cli
   user@host> show pfe terse

   Slot Type Slot      State     Uptime
    0   GFPC Present   Valid     03:46:19
   

4. Verify that the T640 Routing Engines are ready for a graceful switchover by issuing the show system switchover command on the backup Routing Engine:
   user@host> show system switchover

   Graceful switchover: On
   Configuration database: Ready
   Kernel database: Ready
   

   If the status of graceful switchover is not On, or the configuration and kernel database status are not Ready, see the Junos OS System Basics Configuration Guide  for instructions. Do not continue integrating an operational T640 router with the TX Matrix router until the Routing Engines are ready for a graceful switchover.

5. Log out of the backup Routing Engine:
   user@host> exit
   % exit
6. Issue the commit synchronize command, and ensure that there are no synchronization errors:
   user@host# commit synchronize