Replacing Host Subsystem Components; Taking The M320 Host Subsystem Offline; Table 77: Effect Of Taking The Host Subsystem Offline - Juniper M320 Hardware Manual

CHAPTER 26

Replacing Host Subsystem Components

Taking the M320 Host Subsystem Offline

Table 77: Effect of Taking the Host Subsystem Offline

Type of Host Subsystem
Nonredundant host
subsystem
Backup host subsystem
Copyright © 2015, Juniper Networks, Inc.
Taking the M320 Host Subsystem Offline on page 213
Replacing an M320 Routing Engine on page 216
Replacing a Solid-State Disk on an M320 RE-A-1800 Routing Engine on page 218
Inserting or Removing a PC Card from an M320 Routing Engine on page 219
Replacing a DIMM Module in an M320 Routing Engine on page 221
Replacing an M320 Control Board on page 223
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,
and functions as the backup. You can remove the backup host subsystem (or either
RE1
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.
Table 77 on page 213 explains the effect of taking the host subsystem offline.
Effect of Taking the Host Subsystem Offline
The router shuts down.
The functioning of the router is not interrupted. The backup host subsystem is hot-removable
and hot-insertable.
functions as the master
RE0
213