Led Activity During Booting; Abnormal Led Activity - Juniper E-Series Installation And User Manual

LED Activity During Booting

Abnormal LED Activity

Table 10-4 Troubleshooting abnormal LED activity on modules
Diagnostic Signs
• POWER A OK is not lit
• POWER B OK is not lit
When the system boots, it runs diagnostic tests, and the module status
LEDs display various configurations. Observe the scenario presented in
Table 10-3 to verify that the system has booted properly.
Note: When you reboot the system after installing a new version of the software,
the line modules will appear to boot twice.
Table 10-3 Normal activity of functional status LEDS during booting
OK FAIL ONLINE
off on off
off off off
on off off
on off on
If the system detects an error during booting, the FAIL LED turns on.
Some failure conditions may cause the board not to boot. In this case, the
LEDs may all be off. The system should then reset the board.
If the operational software detects an error, the FAIL LED turns on.
Some errors may cause a board reset. Crash information can be displayed
from the console and is printed to the screen on the next reboot.
See Table 10-4 to diagnose and correct problems.
Possible Problems
• System is not receiving
power from Power A.
• System is not receiving
power from Power B.
Understanding Status LEDs to Troubleshoot
Status Process
1 Module is in the power-up restart state; the FAIL
LED stays on briefly.
2 Module is initializing, and diagnostic tests are
running.
3 Module passed the diagnostics; the system boots.
4 Module is now up and running.
Actions
1 Check Power A and Power B terminal connections.
2 Verify that power switches are on.
3 Check connections to power sources.
4 If system still does not operate, contact Juniper
Networks Customer Service.
10-7
E-Series Routers