How to manually switch virtual chassis mastership for EX series switches VC

Summary:

Manually switch virtual chassis master-ship for mixed EX4500 and EX4550

Problem or Goal: Cause: 

Command to Toggle mastership between routing engines

Solution: 

>edit

#set chassis redundancy graceful-switchover

#commit synchronize

#exit

>request chassis routing-engine master switch

References:

Graceful Routing Engine Switchover (GRES)

Problem Solved?

Yes