T640 Control Boards Description; Table 13: T640 Supported Control Boards - Juniper T640 Hardware Manual

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Copyright © 2013, Juniper Networks, Inc.

T640 Control Boards Description

Control Board Function on page 43
Control Board Slots on page 43
Control Boards Supported on page 43
Control Board Function
This chassis supports up to two control boards. The Routing Engine requires an adjacent
control board to provide control and monitoring functions for the router. These functions
include determining Routing Engine mastership, controlling power and reset for the other
router components, monitoring and controlling fan speed, and monitoring system status.
Control Board Slots
You can install up to two control boards in the router. Control boards install into the upper
rear of the chassis in the slots labeled
to bottom). If two control boards are installed, one functions as the master and the other
as its backup. If the master fails or is removed, the backup restarts and becomes the
master.
Each control board requires a Routing Engine to be installed in the adjacent slot.
installs above RE0 , and CB1
Engine is not present in the adjacent slot.
If the host system is redundant, the backup control board is hot-removable and
hot-insertable, but the master control board is hot-pluggable. A control board that is not
redundant is hot-pluggable.
Control Boards Supported
The T640 router supports the control boards listed in

Table 13: T640 Supported Control Boards

Name
Standard control board (EOL
PSN-2006-09-024)
T-CB
NOTE: The T-CB is required for T640 routers
connected to a TX Matrix router.
LCC-CB
NOTE: The LCC-CB is not supported for T640
routers connected to a TX Matrix router.
T640 Hardware Component Overview on page 11
T640 Host Subsystem Description on page 32
Chapter 3: T640 Router Hardware Component Overview
CB0 and CB1 (referred to as CB-0 and CB-1, top
installs below RE1 . Control boards cannot function if a Routing
Model Number
CB-L-T
CB-T
CB-LCC
Table 13 on page 43.
First Supported Junos
OS Release
5.3
7.0
11.2 for standalone T640
routers.
CB0
43