Juniper M Series Monitoring And Troubleshooting Manual page 583

Copyright © 2012, Juniper Networks, Inc.
HCM 0 status:
State
FPGA Revision
HCM 1 status:
State
FPGA Revision
The master HCM is designated Master in the State field.
If you are removing the master Routing Engine and a second Routing Engine is installed,
3.
issue the following command to switch mastership to the standby host module:
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...
If the Routing Engines are running Junos OS Release 6.0 or later and are configured
for graceful switchover, the standby Routing Engine immediately assumes Routing
Engine functions and there is no interruption to packet forwarding. Otherwise, packet
forwarding halts while the standby Routing Engine becomes the master and the Packet
Forwarding Engine components reset and connect to the new master Routing Engine.
For information about configuring graceful switchover, see the section about Routing
Engine redundancy in the Junos OS System Basics Configuration Guide.
NOTE: Router performance might change if the standby Routing Engine's
configuration differs from the former master's configuration. For the most
predictable performance, configure the two Routing Engines identically,
except for parameters unique to a Routing Engine, such as the hostname
defined at the [edit system] hierarchy level and the management interface
(fxp0 or equivalent) defined at the [edit interfaces] hierarchy level.
To configure Routing Engine-specific parameters and still use the same
configuration on both Routing Engines, include the appropriate
configuration statements under the re0 and re1 statements at the [edit
groups] hierarchy level and use the apply-groups statement. For
instructions, see the Junos OS System Basics Configuration Guide.
On the console or other management device connected to the Routing Engine, enter
4.
CLI operational mode and use the following command to shut down the router
software cleanly and preserve Routing Engine state information:
user@host> request system halt
Wait until a message appears on the console confirming that the operating system
has halted.
For more information about the command, see the Junos OS System Basics
Configuration Guide.
Online Master
27
Online Standby
27
Chapter 25: Monitoring the HCM
539