Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1328

Complete Software Guide for Junos
1224
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OS for EX Series Ethernet Switches, Release 10.4
ISSU: Preparing for Switchover
ISSU: Ready for Switchover
Checking In-Service-Upgrade status
Item Status
FPC 0 Online
FPC 2 Offline
FPC 3 Online
Resolving mastership...
Complete. The other routing engine becomes the master.
ISSU: RE switchover Done
ISSU: Upgrading Old Master RE
WARNING: A reboot is required to install the software
WARNING: Use the 'request system reboot' command immediately
ISSU: Old Master Upgrade Done
ISSU: IDLE
Reason
Offlined by CLI command
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