Specifications

Troubleshooting the Router A-3
Reading the LEDs
Reading the LEDs
The LEDs indicate the current operating condition of the router. You can observe the LEDs,
note any fault condition that the router is encountering, and then contact your system
administrator or technical support, if necessary. For information about how to contact
technical assistance, refer to the section “Obtaining Service and Support” in the chapter
“Overview of the router.”
Figure A-1 shows the location of the LEDs on the rear panel of the routers. The power LED,
at the right of the auxiliary port, lights up when the system is working properly. All of the
other LEDs indicate activity by flickering. When there is heavy activity on a port, the LED
might be ON constantly. If an LED is not ON when the port is active and the cable is
connected correctly, there might be a problem with the port.
Figure A-1 LED Locations
H7865
SERIAL 0
SERIAL 1
SERIAL 2 (A/S)
SERIAL 3 (A/S)
10BT
ETHERNET 0
ACT
AUI
LINK
BRI 0
CONSOLE
PWR
AUX
Input: 100-240VAC
Freq: 50/60HZ
Current: 1.2-0.6 A
Watts: 40W
Asynch/synchronous
serial LEDs
Asynch/synchronous
serial LEDs
Ethernet
link LED
Power
LED
BRI
LED
LAN activity
LED