Upgrading the System Software When Running Redundant SAEs
When running the SRC software with redundant SAEs, we recommend that you run the same release of the SRC software on all C Series Controllers in the same Juniper Networks database community. Mixing SRC software releases in a network may cause shared configuration data to be placed in the Juniper Networks database that is not compatible with all versions of the SRC software. As a result, when running redundant SAEs, we recommend that you postpone any planned configuration changes to the C Series Controllers until you complete the SRC software upgrade on all C Series Controllers running in the Juniper Networks database community.
Use the following procedure to upgrade the SRC software on C Series Controllers in a network environment running redundant SAEs. Perform this procedure on each C Series Controller in a serial fashion.
For each router managed by the SAE, issue the request sae shutdown device command to shut down the device driver and force a graceful failover to the redundant SAE.
Disable the SAE by issuing the disable component sae command.
Upgrade the SRC software by issuing the request system upgrade url url command.
Reenable the SAE by issuing the enable component sae command.