T640 Standard Control Boards LEDs
Three LEDs, located on the standard control board faceplate, indicate the status of the
control board.. Table 41 on page 64 describes the functions of the standard control board
LEDs.
Table 41: Standard Control Board LEDs
DescriptionStateColorLabel
Control board is functioning as the master.On steadilyBlueMASTER
Control board has failed.On steadilyYellowFAIL
Control board is online and is functioning normally.On steadilyGreenOK
Control board is powering up, but not online.Blinking
Related
Documentation
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
T640 T Series Control Boards (T-CBs) Description
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.
Copyright © 2017, Juniper Networks, Inc.64
T640 Core Router Hardware Guide
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