Taking The Ptx5000 Host Subsystem Offline - Juniper PTX5000 Hardware Manual

PTX5000 Packet Transport Router Hardware Guide

Taking the PTX5000 Host Subsystem Offline

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Before you replace a Routing Engine, you must take the host subsystem offline. The host
subsystem is taken offline and brought online as a unit. Be aware of the effect of taking
a host subsystem offline on traffic, forwarding, and routing. See
Effect of Taking the PTX5000 Host Subsystem Offline" on page
To take a host subsystem offline:
Determine whether the Routing Engine to be replaced is currently functioning as the
1.
master or as the backup, using one of the following methods:
a. Check the HOST 0 and
LED is lit, the corresponding host subsystem is functioning as the master.
b. Check the
MASTER
host subsystem is functioning as the master.
c. Issue the show chassis routing-engine
designated in the
Master
user@host> show chassis routing-engine
user@host> show chassis routing-engine
Routing Engine status:
Slot 0:
Current state
Election priority
...
If the Routing Engine to be replaced is currently functioning as the master, switch it
2.
to backup using the CLI command:
user@host> request chassis routing-engine master switch
warning: Traffic will be interrupted while the PFE is re-initialized
Toggle mastership between Routing Engines ? [yes,no] (no) yes
Resolving mastership...
Complete. The other Routing Engine becomes the master.
Halt the host subsystem.
3.
user@host> request system halt
Halt the system ? [yes,no] (no) yes
*** FINAL System shutdown message from user@host ***
System going down IMMEDIATELY
Terminated
...
syncing disks... 11 8 done
The operating system has halted.
Please press any key to reboot.
HOST 1 LEDs on the craft interface. If the green
LED on the Control Board. If the blue
command. The master Routing Engine is
field.
Current state
Master
Master (default)
"Understanding the
383.
MASTER
LED is lit, the
MASTER
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