Which command is used to verify that graceful Routing Engine switchover (GRES) is operational?

The command that verifies the operational status of graceful Routing Engine switchover (GRES) is focused on checking the status of the backup Routing Engine (RE). The backup RE is responsible for ensuring that it can take over seamlessly in the event of a failure of the master RE.

When you execute the command on the backup RE, it allows you to assess whether the configuration has been successfully synchronized, which is critical for GRES functionality. This synchronization indicates that the backup RE is indeed ready to take over if needed and that the switchover mechanism is fully operational.

Using commands on the master RE could provide insights into its current status, but the verification of GRES is primarily concerned with the readiness of the backup RE, which is why the command used for that purpose is essential. This focus on the backup RE ensures that if a switchover occurs, it will be both seamless and effective, maintaining network stability and service continuity.