Juniper ERX - RELEASE 11.1.X HARDWARE GUIDE 03-23-2010 Hardware Manual page 118

ERX 11.1.x Hardware Guide
Table 12: Troubleshooting Abnormal LED Activity on Modules (continued)
Diagnostic Signs Possible Problems
FAN OK LED does
not light
FAN FAIL LED lights
LINK LED is not lit
RED ALM is lit
YEL ALM is lit
NOTE: This LED is not
functional on the HSSI
line module.
System does not
boot.
Modules held
offline.
FAIL LED lights.
No LED indications or
obvious signs.
102
Understanding Status LEDs to Troubleshoot
Fan is not working properly
or has slowed down.
Fan needs replacement.
Ethernet connection is down.
System does not recognize
a port connection.
Cabling is not connected
properly.
Cable is faulty.
Clocking problem exists.
Far end receive failure
(FERF) exists.
A slot group is overloaded.
System temperature is too
high.
Vents are blocked.
Fans are not operating.
Actions
Contact Juniper Networks Customer Service; the system must
be serviced.
1. Make sure that Ethernet cables are properly connected
to both the Ethernet port and the appropriate network
device.
2. Contact Juniper Networks Customer Service.
1. Make sure that all cables are firmly plugged into the ports
and the attached network device.
2. Verify that cables are clean.
3. Test for faulty cables.
4. Verify clock source and configuration.
5. Reset system.
NOTE: Problem is corrected when normal LED activity
occurs.
1. Correct FERF problem.
2. Reset system.
NOTE: Problem is corrected when normal LED activity
occurs.
1. Issue the show version command to display module
status.
2. Review section on proper slot group configuration in
"Installing Modules" on page 31.
3. Reconfigure system with correct slot group configuration.
4. Reset system.
1. Look at your console for a message indicating the
problem. If you have the system log set to a severity of
WARNING or higher, a Warning message indicates the
failure.
2. Issue the show environment command to display the
temperatures. If the temperature is too high, power down
the system.
3. Regulate temperature.
4. Reset system.