Cabletron Systems manual Troubleshooting CSX200 Hardware, Troubleshooting the LAN

Chapter 5: Troubleshooting

Troubleshooting CSX200 Hardware

Power (PWR) LED is OFF

•Check that the power connection is firmly attached to the back panel of the CSX200, and the other end to an active power source.

Processor (CPU) LED is OFF

If the CPU stays OFF for an extended amount of time, and the power (PWR) light remains on, the CPU is in an unknown state.

•Contact Cabletron Systems Global Call Center for technical support (refer to Getting Help in Chapter 1, Introduction).

Processor (CPU) LED is RED

The processor has detected a fault condition.

•Contact Cabletron Systems Technical Support (refer to Getting Help in Chapter 1, Introduction).

Troubleshooting the LAN

Collision (CLN) LED is RED

Collisions are normal in an Ethernet network, however, increased collisions may indicate that the network is out of specification (the propagation delay between two nodes on the network exceeds 25.6 µs).

Link (LNK) LED is OFF

•Check that the CSX200 and the device at the other end of the segment are powered up.

•Verify that the RJ45 connectors on the twisted pair segment have the correct pinouts.

•Check the cable for continuity.

•Check that the cable meets the specifications for dB loss.

5-4 CSX200 Installation Guide