Juniper EX9214

Installing an RE Module in an EX9200 Switch | 227
Upgrading an EX9200-SF to an EX9200-SF2 | 229
Upgrading to an EX9200-SF3 | 233
Removing an SF Module from an EX9200 Switch | 236
Installing an SF Module in an EX9200 Switch | 238
Maintaining the Host Subsystem in EX9200 Switches | 242
Taking the Host Subsystem Oine in an EX9200 Switch
Before removing a Roung Engine module (RE module) from an EX9200 switch, take the host subsystem
oine.
The host subsystem performs switching and system management funcons in an EX9200 switch.
To take a host subsystem oine:
1. Determine whether the host subsystem is the primary 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 funconing as the primary.
• Issue the show chassis routing-engine CLI command. The output of this command will show whether
the host subsystem is funconing as the primary or backup.
2. If the host subsystem is funconing as the primary, switch it to backup using the request chassis
routing-engine master switch command.
3. On the console or other management device connected to the primary Roung Engine, enter CLI
operaonal mode and issue the request system halt command. The command shuts down the Roung
Engine gracefully, so its state informaon is preserved.
Wait unl a message appears on the console conrming that the operang system has halted.
NOTE: The Switch Fabric module (SF module) might connue forwarding trac for
approximately 5 minutes aer the request system halt command has been issued.
225