Replacing The T320 Host Subsystem Components; Taking The T320 Host Subsystem Offline; Figure 80: Installing A Replacement T320 Craft Interface; Table 24: Effect Of Taking The T320 Host Subsystem Offline - Juniper T320 Hardware Manual

T320 Core Router Hardware Guide
Related
Documentation

Replacing the T320 Host Subsystem Components

Taking the T320 Host Subsystem Offline

Table 24: Effect of Taking the T320 Host Subsystem Offline

Type of Host Subsystem
Nonredundant host
subsystem
Backup host subsystem
160

Figure 80: Installing a Replacement T320 Craft Interface

T320 Craft Interface Description on page 35
T320 Craft Interface LCD and Navigation Buttons on page 36
Troubleshooting Using the T320 Craft Interface LEDs on page 128
To replace a host subsystem, perform the following procedures::
Taking the T320 Host Subsystem Offline on page 160
Replacing a T320 T-CB on page 162
Replacing a T320 PC Card on page 165
Replacing a DIMM Module in T320 Routing Engines on page 166
Replacing a T320 Routing Engine on page 168
The host subsystem is taken offline and brought online as a unit. Before you replace a
T-CB or 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 24 on page 160 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
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