Juniper E Series Hardware Manual page 124

ERX 7.0.x Hardware Guide
Table 13: Troubleshooting Abnormal LED Activity on Modules (continued)
Diagnostic Signs
LINK LED is not lit
RED ALM
YEL ALM
NOTE: This LED is not functional on the
HSSI line module.
System will not boot.
Module(s) held offline.
FAIL LED lights.
None
108
Understanding Status LEDs to Troubleshoot
Possible Problems
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
1. Check that Ethernet cables are
properly connected to both the
Ethernet port and the appropriate
network device.
2.
Contact Juniper Networks Customer
Service.
1. Check 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 is observed.
1. Correct FERF problem.
2.
Reset system.
NOTE: Problem is corrected when
normal LED activity is observed.
1.
Issue the show version command
to display board status.
2. Review section on proper slot
group configuration in "Installing
Modules" on page 35.
3.
Reconfigure system with correct
slot group configuration.
4.
Reset system.
1.
Check 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 indicating the failure is
displayed.
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.