Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1119

Action
Copyright © 2010, Juniper Networks, Inc.
On the master switch, verify the member ID of the backup Routing Engine:
{master:0}
show virtual-chassis status
user@switch>
Virtual Chassis ID: 5efa.4b7a.aae6
Member ID Status Serial No
0 (FPC 0) Prsnt BM0208105281 ex4200-24t
1 (FPC 1) Prsnt BP0208192350 ex4200-48t
Member ID for next new member: 2 (FPC 2)
Connect to the backup Routing Engine:
{master:0}
request session member 1
user@switch>
{backup:1}
user@switch>
Verify that the backup Routing Engine is ready for switchover on member ID 1:
{backup:1}
show system switchover
user@switch>
Graceful switchover: On
Configuration database: Ready
Kernel database: Ready
Peer state: Steady State
Switch the current backup Routing Engine to master Routing Engine:
NOTE: You must wait a minimum of two minutes between Routing Engine
failovers for the Routing Engines to synchronize.
{backup:1}
request chassis routing-engine master acquire
user@switch>
Verify that the master and backup Routing Engines have switched roles:
NOTE: Member ID
{master:1}
show virtual-chassis status
user@switch>
Virtual Chassis ID: 5efa.4b7a.aae6
Member ID Status Serial No
0 (FPC 0) Prsnt BM0208105281 ex4200-24t
1 (FPC 1) Prsnt BP0208192350 ex4200-48t
Chapter 40: Verifying EX4200 Virtual Chassis Configuration
Mastership
Model priority
255
255
1 is now the master and member ID
Mastership
Model priority
255
255
Neighbor List
Role ID Interface
Master* 1 vcp-0
Backup 0 vcp-0
0 is now the backup.
Neighbor List
Role ID Interface
Backup 1 vcp-0
Master* 0 vcp-0
1015