JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 22

You received an alert from your monitoring system that the master Routing Engine (RE) on an EX4300 switch in a virtual chassis has hardware issues and might need to be replaced. Because the switch already had graceful Routing Engine switchover (GRES) enabled and configured, you must perform a manual switchover to the backup RE to avoid disruption.
Which command would be used to perform the manual RE switchover?

Answer options

• A. Log in to the backup RE and issue the restart chassis-control operation command.
• B. Log in to the master RE and issue the request chassis routing-engine master switch operation command.
• C. Log in to the master RE and issue the request chassis routing-engine master acquire operation command.
• D. Log in to the backup RE and issue the restart iccp-service operation command.

Correct answer: B

Explanation

The correct answer is B because it specifically instructs the master RE to switch control to the backup RE, which is necessary for a manual switchover. Options A and D involve commands for the backup RE that do not facilitate a master switch, while option C is incorrect as it attempts to acquire rather than switch the master RE.