Juniper Networks ERX Hardware 8 - Manual (Page 128)

ERX 8.0.x Hardware Guide
Figure 49: E3 and T3 Module LEDs
Functional status LEDs
Interface status LEDs
OK
FAIL
ONLINE
REDUNDANT
0
1
2
RED
ALM YEL
ALM
SYNC
g013770
LED Activity
When the system boots, it runs a series of tests for each module installed in
the system, and the LEDs display various configurations. See Table 12 and
Table 13 to understand normal and abnormal LED activity.
NOTE: When you reboot the system after installing a new version of the software,
the line modules appear to boot twice.
Table 12: Normal Activity of Functional Status LEDS During Booting
OK FAIL ONLINE Status Process
off on
(off for GE-2 LM and
GE-HDE LM)
off 1. Module is in the
power-up restart
state; the FAIL LED
stays on briefly.
off on off 2. Module is
initializing, and
diagnostic tests are
running; the FAIL LED
stays on briefly.
110 Understanding Status LEDs to Troubleshoot