Replacing The T640 Host Subsystem Components; Taking The T640 Host Subsystem Offline; Figure 100: Installing A Replacement Craft Interface - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
Related
Documentation

Replacing the T640 Host Subsystem Components

Taking the T640 Host Subsystem Offline

198

Figure 100: Installing a Replacement Craft Interface

T640 Craft Interface Description on page 41
T640 Craft Interface LCD and Navigation Buttons on page 43
Troubleshooting Using the T640 Craft Interface LEDs
T640 Preventing Electrostatic Discharge Damage on page 306
To replace a routing engine or control board:
1. Taking the T640 Host Subsystem Offline on page 198
Replacing a T640 T-CB on page 201
2.
Replacing a T640 PC Card on page 203
3.
Replacing a DIMM Module in T640 Routing Engines on page 205
4.
Replacing a T640 Routing Engine on page 206
5.
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 T640 router,
master and functions as the backup. You can remove the backup host subsystem
RE1
(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.
Table 33 on page 199 explains the effect of taking the host subsystem offline.
RE0 functions as the
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