124APPENDIX A: TROUBLESHOOTING

Normal LED

This section describes the normal operation of the SuperStack II

Meanings

bridge/router LEDs.

System LEDs The following figure describes the system LEDs.

Normal operation

Run

Aux

Status Load

Test

Power /Fault

Lights green when unit has power. Lights amber if there is a problem with power. When unlit, power to unit is off.

Flashes green each time a packet is forwarded between

SYSTEM

Fwd Power /Fault

Fwd

Aux

two ports.

Reserved for future use (model 4xx only).

Run

Load

Test

Status

Lights green when the software has successfully loaded and is running.

Unlit in normal operation. Flashes green during startup to indicate system is loading software. Lights amber when there is a load problem.

Unlit in normal operation. Lights amber during startup to indicate system is running self-tests.

Provides additional status for the Run, Load, and Test LEDs.

Serial LEDs The following figure describes the serial LEDs.

A B C* D*

Link

A B C D

Link

ActiveActive

Fault

Fault

Lights green when the path is up.

Lights green when there is a physical connection to a serial device such as a CSU/DSU or modem

Unlit in normal operation. Lights amber if an error in the frames is detected.

Normal operation

* Model 5xx only

Page 124
Image 124
3Com SuperStack II Normal LED, Meanings, Bridge/router LEDs, System LEDs The following figure describes the system LEDs