T640 T Series Control Boards (T-Cbs) Leds; Table 42: T-Cb Leds; Troubleshooting The T640 Host Subsystem; Troubleshooting The T640 Control Board - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 T Series Control Boards (T-CBs) LEDs

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66
Three LEDs, located on the T-CB faceplate, indicate the status of the T-CB.
Table 42 on page 66 describes the functions of the T-CB LEDs.

Table 42: T-CB LEDs

Label Color
Blue
MASTER
Yellow
FAIL
Green
OK
T640 Host Subsystem Description on page 35
T640 Control Boards Description
T640 T Series Control Boards (T-CBs) Description on page 64
Troubleshooting the T640 Host Subsystem on page 472
Troubleshooting the T640 Control Board on page 473
State Description
On steadily T-CB is functioning as the master.
On steadily T-CB has failed.
On steadily T-CB is online and is functioning normally.
Blinking T-CB is powering up, but not online.
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