Juniper Networks E-Series - Manual (Page 99)

Status LEDs
E-Series Routers
7-3
Initialization Sequence
Each E-series line module is initialized independently. As a result, the
CLI on the SRP module may become available before the line modules
have completed initialization. Commands relating to a line module may
fail if the module has not completed initialization. The
show version
command can be used to display line module status. Do not enter
commands for a line module until its state is “online”.
Status LEDs
Upon initial powerup, the components of the E-series router run boot
code, go through a series of self diagnostic tests, and synchronize with
each other.
When the tests are complete, use the LEDs on each module to determine
the status of the router. Observe the line module and SRP module LEDs
in the front, and the I/O line module and SRP I/O module LEDs in the
rear.
Refer to Chapter 10, Troubleshooting , for information on the system’s
LEDs.
Powering Down
If you need to power down or remove the SRP module, first enter the
halt command to temporarily suspend the system’s operation. See
E-Series System Basics Configuration Guide, Chapter 4, Managing the
System
for more information.
Caution: If you do not use the halt command before removing or powering down
an SRP module, the system’s NVS card may become corrupted.
If you shut down the system improperly, it will run an investigation of the
file allocation table (FAT) the next time it reboots.
The Next Step
If you have problems powering up the system, turn to Chapter 10,
Troubleshooting , for help.
If the system boots properly, turn to Chapter 8, Accessing E-Series
Routers .