T320 Control Board Description; Table 8: Supported T320 Control Boards - Juniper Core Router T Series Hardware Manual

T320 Core Router Hardware Guide
Related
Documentation

T320 Control Board Description

30
Each host subsystem has three LEDs that display its status. The host subsystem LEDs
are located on the upper right of the craft interface. For more information about the host
subsystem LEDs, see "T320 Craft Interface Host Subsystem LEDs" on page
The host subsystem consists of the following components:
One or two Routing Engines
One or two control boards
Maintaining the T320 Host Subsystem on page 275
Replacing the T320 Host Subsystem Components on page 205
Taking the T320 Host Subsystem Offline on page 205
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.
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
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.
The T320 router supports the control boards listed in
NOTE: If two control boards are installed, they must both be the same
hardware model during normal operations. A mix of hardware model numbers
is supported only during upgrade.

Table 8: Supported T320 Control Boards

Name
Standard control board (EOL PSN-2006-09-024)
T Series control board (T-CB)
and (referred to as
CB0 CB1
installs below RE1 . Control boards cannot function if a Routing
23.
and
CB-0 CB-1
Table 8 on page 30.
Model Number
CB-L-T
CB-T
Copyright © 2018, Juniper Networks, Inc.
, top to
CB0