Note After trying each diagnostic tip in table 3-2 below, reboot the router as
directed; if a failure then occurs, use table 3-1, “LED Error Patterns
During Power-On Self-Test,” to interpret the LED error patterns.
Table 3-2. LED Error Patterns During Router Operation*
Status Pwr/
Fan/
Temp
Card Self-
test
Port
†
Net
†
Fail
Diagnostic Tips
Routing Engine Software Failure
Pwr
Engine: If this error occurs, this pattern of LEDs appears only for a
few seconds until the router reboots (which will occur unless
Auto Reboot in the configuration has been disabled). If Auto
Reboot has been disabled, press the Reset button on the
routing engine to force the router to reboot.
Fan
Card:
NetFail
Status Temp
(all ports)
After the router reboots, information about the failure will
appear in the crash history (which can be displayed using
NCL’s Crash command) and in the event log (which can be
displayed from the Main menu).
Interface Card Software Failure
Pwr
Engine: If this error occurs, this pattern of LEDs appears only for a
few seconds until the router reboots (which will occur unless
Auto Reboot in the configuration has been disabled). If Auto
Reboot has been disabled, enable the card either by hot-
swapping it (do steps 1–5 and 8–11 of the procedure “Replac-
ing an Interface Card [System Online], page 3-21) or by using
NCL’s Enable command (see the
Operator’s Reference
).
Fan
Card:
NetFail
Status Temp
(all ports)
Information about the failure will appear in the crash history
(which can be displayed using NCL’s Crash command) and in
the event log (which can be displayed from the Main menu).
Interface Card Apparently Not Present
Pwr
Engine:
1. If there is an interface card in this slot, verify that it is
seated properly in the router slot.
Fan
Card:
Status Temp
(all ports)
2. If this error persists, switch the power off and on, then
check the LEDs for failures as indicated in table 3-1.
*
In this table, a black box indicates an orange LED, a gray box indicates a green LED, and an empty box indicates an unlit LED.
†
The Port Number LED for each port, when lit, shows its port number on its interface card. Unless otherwise specified, the Port
Number and Net Fail LEDs appear as shown for
all
ports on the interface card.
Troubleshooting
Interpreting LED Error Patterns
3-6
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