Troubleshooting The T640 Host Subsystem; Table 96: T640 Host Subsystem Alarm Messages - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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Troubleshooting the T640 Host Subsystem

Problem

Table 96: T640 Host Subsystem Alarm Messages

Component Alarm Type
Host subsystems Red
Yellow
Solution
472
If the craft interface display lists only one fan failure and the other fans are functioning
3.
normally, the fan is probably faulty and you need to replace the fan tray.
Use the CLI to check the status of the fans. For example, you can issue the following
4.
command to get information about the source of an alarm condition:
user@host> show chassis alarms
For information about the alarms, see
T640 Cooling System Description on page 31
Maintaining the T640 Air Filters on page 444
Maintaining the T640 Fan Trays on page 445
Replacing a T640 Air Filter on page 281
Description:
The following alarms and LEDs indicate a problem with a host subsystem control board
or Routing Engine:
The red host subsystem
The green host subsystem
A red alarm indicates that the host subsystem has been removed.
A yellow alarm indicates that the host subystem has failed.
In Table 96 on page 472, the text in the column labeled "LCD Message" appears in the
display of the craft interface. The text in the column labeled "CLI Message" appears in
the output from the
show chassis alarms
LCD Message
Host host-number Removed
Host host-number Failure
To troubleshoot the T640 host subsystems:
Check the LEDs on the faceplate of each control board and Routing engine.
1.
Check the LEDs on the craft interface.
2.
Table 95 on page
FAIL LED on the craft interface is lit.
LED on the craft interface is not lit.
OK
command.
470.
CLI Message
Host host-number Removed
Host host-number Failure
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