Juniper E Series User Manual

E-series Hardware Guide
106 ! Understanding Status LEDs to Troubleshoot
Redundancy Status
You can determine the redundancy state of line modules by examining the online
and redundant status LEDs (ERX-7xx/14xx models only). See Table 15.
! 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.
None
! System temperature is too high.
! Vents are blocked.
! Fans are not operating.
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.
Table 14: Troubleshooting abnormal LED activity on modules (continued)
Diagnostic Signs Possible Problems Actions
NOTE: The REDUNDANT LED on the cOCx/STMx, FE-8, GE/FE, HSSI, and
OCx/STMx modules is nonfunctional.

Juniper E Series Specifications

General

Brand	Juniper
Model	E Series
Category	Network Router
Language	English