Troubleshooting

Interpreting LED Error Patterns

Table 4-1. LED Error Patterns at End of Power-On or Reset Self-Test

LEDs on Router Module’s Cover Plate

 

 

 

 

 

 

 

Router

Router

Hub

WAN

SNMP

Diagnostic Tips

Self-Test

Fault

(LAN)

Net Fail

Mgt

 

 

 

Net Fail

 

Fault

 

 

 

 

 

 

 

ON

ON

*

*

OFF

Refer to “Router Self-Test LED On, Fault LED On”, page 4-7.

 

 

 

 

 

 

ON

OFF

OFF

OFF

*

Refer to “Router Self-Test LED On, Fault LED Off”, page 4-8.

 

 

 

 

 

 

*

ON

ON

*

OFF

Replace the router module.

 

 

 

 

 

 

ON

ON

*

*

ON

The SNMP module is faulty and/or its firmware code has become

 

 

 

 

 

corrupted. Firmware corruption is frequently the result of a failure

 

 

 

 

 

during downloading of new code into the SNMP module.

 

 

 

 

 

If this error occurs after downloading new code, repeat the

 

 

 

 

 

download process. If not, or if the error persists after repeating the

 

 

 

 

 

download process, replace the SNMP module.

 

 

 

 

 

 

OFF

OFF

OFF

ON

*

Port failure detected.

 

 

 

 

 

1. Make sure that the proper WAN cable is properly connected to the

 

 

 

 

 

router module and to the network. (Refer to “Connect the WAN

 

 

 

 

 

Cable”, page 1-16, and to appendix A, “Cables and Connectors”.)

 

 

 

 

 

2. If the error persists, make sure the WAN is specified correctly in

 

 

 

 

 

the configuration. (Refer to “Create or Modify a Router

 

 

 

 

 

Configuration”, page 2-5.)

 

 

 

 

 

3. If the error still persists, check for a fault in the network equipment

 

 

 

 

 

or links.

 

 

 

 

 

4. If the error still persists, replace the WAN cable.

 

 

 

 

 

5. If the error still persists, replace the router module.

 

 

 

 

 

 

*This LED is not important for the diagnosis.

 

 

 

 

 

 

 

 

4-4