T640 Standard Control Boards Leds; T640 T Series Control Boards (T-Cbs) Description; Table 41: Standard Control Board Leds - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 Standard Control Boards LEDs

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T640 T Series Control Boards (T-CBs) Description

64
Three LEDs, located on the standard control board faceplate, indicate the status of the
control board.. Table 41 on page 64
LEDs.

Table 41: Standard Control Board LEDs

Label Color
MASTER Blue
FAIL Yellow
Green
OK
T640 Chassis Description on page 15
Replacing a T640 Standard Control Board or T-CB on page 313
Maintaining the T640 Control Boards on page 449
Each T-CB consists of the following components:
100-MB Ethernet switch for intermodule communication.
PCI bus to the Routing Engines.
Processor subsystem (SPMB).
Figure 26 on page 65 shows the T-CB.
describes the functions of the standard control board
State Description
On steadily Control board is functioning as the master.
On steadily Control board has failed.
On steadily Control board is online and is functioning normally.
Blinking Control board is powering up, but not online.
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