Replacing M120 Host Subsystem Components; Taking The M120 Host Subsystem Offline; Figure 68: Installing The M120 Front Air Filter - Juniper M120 Hardware Manual

M120 Multiservice Edge Router Hardware Guide
Related
Documentation

Replacing M120 Host Subsystem Components

Taking the M120 Host Subsystem Offline

140

Figure 68: Installing the M120 Front Air Filter

M120 Cooling System Description on page 32
Maintaining the M120 Air Filter on page 102
Troubleshooting the M120 Cooling System on page 120
Taking the M120 Host Subsystem Offline on page 140
Replacing an M120 CB on page 143
Replacing a DIMM Module in M120 Routing Engines on page 145
Replacing an M120 Routing Engine on page 147
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
functions as the master
RE0
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