To take a host subsystem offline:
1. Determine whether the host subsystem is the master or backup using one of these
methods:
•
Look at the MASTER LED on the RE module faceplate. If the MASTER LED is lit
steady green, the corresponding host subsystem is functioning as the master.
•
Issue the show chassis routing-engine CLI command. The output of this command
will show whether the host subsystem is functioning as the master or backup.
2. If the host subsystem is functioning as the master, switch it to backup using the request
chassis routing-engine master switch command.
3. On the console or other management device connected to the master Routing Engine,
enterCLI operationalmode and issue the requestsystem halt command. The command
shuts down the Routing Engine gracefully, so its state information is preserved.
Wait until a message appears on the console confirming that the operating system
has halted.
NOTE: The Switch Fabric module (SF module) might continue forwarding
traffic for approximately 5 minutes after the request system halt command
has been issued.
Related
Documentation
• Maintaining Host Subsystem in EX9200 Switches on page 275
• Host Subsystem in an EX9200 Switch on page 32
227Copyright © 2017, Juniper Networks, Inc.
Chapter 18: Replacing Routing Engine (RE) Module
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