Troubleshooting
Interpreting LED Error Patterns
Table
| Operational fault LED patterns |
| Diagnostic Tips | |
Power | Fault | Net Fail |
| |
|
|
|
|
|
Unlit | * | * | * | Check power cord and power source. If they are OK, replace |
|
|
|
| the router. |
Lit | Unlit | Lit | All | Software failure. Press Reset button or enter NCL Boot |
|
|
| Unlit | command if router is not set to reboot automati cally. Check |
|
|
|
| console after you boot for the crash message. (You can re- |
|
|
|
| examine the crash messages any time with NCL’s Crash |
|
|
|
| command.) |
Lit | * | Lit | All Lit | While Reset button is pressed or when power is applied, this |
|
|
|
| pattern is normal. If Reset is not pressed when you see this |
|
|
|
| pattern, go to the next row. |
Lit | Unlit | Lit | Any Ports Lit | Port failure. Cycle power or press Reset button to run self- |
|
|
|
| test. Interpret results using table |
Lit | Unlit | Unlit | Any WAN | For |
|
|
| Lit | is enabled, then the WAN port is not hearing properly |
|
|
|
| addressed |
|
|
|
| This may be due to faulty or disconnected network hardware |
|
|
|
| or improper configuration. If nothing is to be connected to |
|
|
|
| this port, set Auto Enable to No for this circuit in the |
|
|
|
| Configuration Editor or delete the configuration for this port. |
Lit | Unlit | Unlit | Ethernet | The driver is unable to send data. Data is sent by a protocol |
|
|
| (802.3) LAN | or when XCVR Signal Polling is enabled on this LAN port. The |
|
|
| Lit | failure may be due to faulty or disconnected network hard- |
|
|
|
| ware, excessive collisions, or excessive deferrals. If nothing |
|
|
|
| is to be connected to this port, set Auto Enable to No for this |
|
|
|
| circuit in the Configuration Editor. |
Lit | Unlit | Unlit | Token Ring | Ring error occured. Either the cable is not properly attached |
|
|
| (802.5) LAN | or the wrong ring interface rate is active. (Options are 4 |
|
|
| Lit | Mbit/s, 16 Mbit/s, or 16 Mbit/s ETR). Check both end |
|
|
|
| connections of the cable and then use the Quick |
Configuration utility to verify that you are using the proper rate. (The Ring Interface parameter is listed in the ‘‘Port Conf’’ column of the ‘‘Token Ring’’ row of Quick configuration screens in routers having a token ring port.)
*This LED is not important for the diagnosis.
Troubleshooting 3