Juniper M120 - Taking the M120 Host Subsystem Offline

Start time 2006-08-29 09:34:59 PDT
Uptime 1 hour, 28 minutes, 51 seconds
• To check the status of the CBs, issue the show chassis environment cb command. The
output is similar to the following:
user@host> show chassis environment cb
CB 0 status:
State Online Master
Temperature 67 degrees C / 152 degrees F
Power
1.2 V 1218 mV
1.5 V 1498 mV
2.5 V 2520 mV
3.3 V 3332 mV
5.0 V 5066 mV
3.3 V bias 3296 mV
Bus Revision 15
FPGA Revision 20
CB 1 status:
State Online Standby
Temperature 66 degrees C / 150 degrees F
Power
1.2 V 1214 mV
1.5 V 1501 mV
2.5 V 2510 mV
3.3 V 3306 mV
5.0 V 5111 mV
3.3 V bias 3296 mV
Bus Revision 15
FPGA Revision 20
For more information about using the CLI, see the Junos OS documentation.
Related
Documentation
M120 Router Chassis Description on page 7•
• M120 Host Subsystem Description on page 21
• Taking the M120 Host Subsystem Offline on page 267
• Replacing an M120 CB on page 202
• Replacing an M120 Routing Engine on page 195
Taking the M120 Host Subsystem Offline
The host subsystem is taken offline and brought online as a unit. Before you replace a
CB or a Routing Engine, you must take the host subsystem offline.
Normally, if two host subsystems are installed in the router, RE0 functions as the master
and RE1 functions as the backup. You can remove the backup host subsystem (or either
of its components) without interrupting the functioning of the router. If you take the
master host subsystem offline, the backup host subsystem becomes the master (the
router might reboot, depending on your configuration). If the router has only one host
subsystem, taking the host subsystem offline causes the router to shut down.
267Copyright © 2018, Juniper Networks, Inc.
Chapter 31: Maintaining Components and Cables