Led Identification - Juniper E Series Hardware Manual

with LED activity so that you can easily detect and correct a module-related
problem with minimal or no system downtime.

LED Identification

The system's modules have two sets of status LEDs. The top set indicates
overall router and module status. The bottom set indicates module-specific
status, such as port status (line modules) or fan status (SRP module).
The number next to the port status LED on a line module corresponds to the
number of the port on the I/O module. Some line modules have more port
status LEDs than the number of ports on the I/O module. In these cases, only
the LEDs for the corresponding ports on the I/O modules are active.
For example, an OCx/STMx line module can pair with either an OC3-4 or
an OC12/STM4 I/O module. Consequently, the line module has four port
status LEDs for OC3/STM1 operation. However, only the top set of port
status LEDs is active during OC12/STM4 operation.
Table 11 shows the functions of the module and port status LEDs.
Table 11: LED Identification and Activity Descriptions
LED Location LED Label
OK
All modules
FAIL
ONLINE
REDUNDANT
All modules
SRP module POWER A OK
POWER B OK
FAN OK
FAN FAIL
LINK
ACTIVITY
LED Indicator LED Color
Green
Module status
Module status Red
Module status Green
Green
Redundancy
NOTE: The REDUNDANT LED on the cOCx/STMx, FE-8, GE/FE, HSSI, OCx/STMx,
and X.21/V.35 line modules is nonfunctional.
Power Green
Power
Green
Fan Green
Fan
Red
NOTE: When the LED alternates between OK and FAIL at ten-second intervals, a
noncritical fan failure exists.
Green
Ethernet
Green
Ethernet
Understanding Status LEDs to Troubleshoot
Troubleshooting
OFF to ON ON to OFF
Self-test passed Failure detected
Failure detected Diagnostic test
running
Module online Module offline
See "Redundancy Status" on page 109.
Power online on Power off
source A
Power online on Power off
source B
Fan online Critical fan failure
Critical fan failure Fan online
Ethernet link up Ethernet link
down
Blinks when No Ethernet traffic
Ethernet traffic on link
on link
101