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5 – Diagnostics and Troubleshooting
LED Blink Patterns
5-4 SN0051102-00 A
S
Management Port IP Address Conflict Blink Pattern
The system fault LED generates a four-blink pattern (once per second) followed
by a two second pause when the router detects an IP address conflict on the
management Ethernet port.
You can clear the IP address conflict blinking using the CLI or the Router
Manager. Use the beacon OFF function.
Over-Temperature Blink Pattern
The system fault LED generates a five-blink pattern (once per second) followed by
a two-second pause when the router is in an over-temperature condition. For
example, this occurs when the air temperature inside the router is over the failure
temperature of 70
°C (158°F).
If the system alert LED shows the over-temperature blink pattern, do the following:
Inspect the chassis air vents. Are the intake and exhaust vents clear?
Yes – Continue.
No – Remove any debris from the fan intake and exhaust if necessary.
If the condition remains, continue.
Consider the ambient air temperature near the router and clearance around
the router. Make necessary corrections. If the condition remains:
a. Open a command line window and log on to the router.
b. Enter the shutdown command.
c. Power down the router.
d. Contact your authorized maintenance provider.