Juniper Networks E-Series Network Router User Manual


 
CHAPTER 10
Troubleshooting
10-8
FAIL LED lights The line module and I/O
module are incompatible.
A hardware failure, such
as a failed module.
1 Check that the line and I/O modules are compatible;
replace if necessary.
2 If you replaced the I/O module only, issue the reload
slot slot_number command.
3 If you replaced the line module or if there was a
hardware failure, the system should automatically
reset the module.
4 If condition persists, contact Juniper Networks
Customer Service.
FAN OK does not light
FAN FAIL LED lights
Fan is not working
properly or has slowed
down.
Fan needs replacement.
Contact Juniper Networks Customer Service; the system
must be serviced.
LINK LED is not lit Ethernet connection is
down.
1 Check that Ethernet cables are properly connected to
both the Ethernet port and the appropriate network
device.
2 Contact Juniper Networks Customer Service.
RED ALM System does not
recognize a port
connection.
Cabling is not connected
properly.
Cable is faulty.
Clocking problem exists.
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.
YEL ALM
Note: This LED is not
functional on the HSSI line
module.
Far end receive failure
(FERF) exists.
1 Correct FERF problem.
2 Reset system.
Note: Problem is corrected when normal LED activity is
observed.
System will not boot.
Module(s) held offline.
FAIL LED lights.
A slot group is overloaded. 1 Issue the show version command to display board
status.
2 Review section on proper slot group configuration in
Chapter 5, Installing Modules.
3 Reconfigure system with correct slot group
configuration.
4 Reset system.
Table 10-4 Troubleshooting abnormal LED activity on modules (continued)
Diagnostic Signs Possible Problems Actions