Juniper Internet Router M160 Hardware Manual page 184

M160 Internet Router Hardware Guide
3.
4.
5.
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]
defined at the
To configure Routing Engine-specific parameters and still use the same configuration
on both Routing Engines, include the appropriate configuration statements under
the
statement. For instructions, see the JUNOS System Basics Configuration Guide.
160
Replacing Host Module Components
Remove the rear component cover by loosening the thumbscrew at each
corner of the cover and pulling it straight off the chassis. For complete
instructions, see "Removing the Rear Component Cover" on page 86.
If two host modules are installed, use one of the following two methods to
determine which is functioning as master:
Note which of the green host module
interface.
Issue the following CLI command. The master Routing Engine is
designated in the
Master
user@host> show chassis routing-engine
Routing Engine status:
Slot 0:
Current state
...
If the component you are removing belongs to the master host module and a
second host module is installed, issue the following CLI command to switch
mastership to the standby host module:
user@host> request chassis routing-engine master switch
If the Routing Engines are running JUNOS 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 System Basics Configuration Guide.
hierarchy level and the management interface (
[edit interfaces]
and statements at the
re0 re1
MASTER
field:
Current state
Master
hierarchy level.
hierarchy level and use the
[edit groups]
LEDs is lit on the craft
or equivalent)
fxp0
apply-groups