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Taking the Host Subsystem Offline in an EX9208 Switch
Before removing a Routing Engine (RE) module from an EX9208 switch, take the host subsystem offline.
The host subsystem performs switching and system management functions in an EX9208 switch. Your switch can have either one or two host subsystems.
To take a host subsystem offline:
- 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.
- If the host subsystem is functioning as the master, switch it to backup using the request chassis routing-engine master switch command.
- On the console or other management device connected to
the master Routing Engine, enter CLI operational mode and issue the request system 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 (SF) module might continue forwarding traffic for approximately 5 minutes after the request system halt command has been issued. |
