3Com 52x, 32x manual Token Ring, Connection, Symptom Cause and Action

4-4CHAPTER 4: TROUBLESHOOTING

Troubleshooting	This section is not applicable to model 320. Table 4-4 summarizes
the Token Ring	problems that can occur with a token ring connection and what action
Connection	you can take.

Table 4-4Troubleshooting the Token Ring Connection (Models 327 and 527 only)

Symptom Cause and Action

The LAN LEDs are doing the following: The following are possible problems indicated by the LED indicators:

■16 MB LED is blinking slowly (turning on then off at approximately 15 second intervals).

■The Fault LED is on.

Cable connection problem

The LAN cable may be improperly connected. Verify that the LAN cable is properly connected at both ends. Check the wall plate if used and the multistation access unit (MAU) of the central wiring center.

Bad cable

You may be cabling your STP or UTP connector with a faulty or improperly wired cable. Swap the cable for another cable that is known to work.

Bad concentrator port

The port or port connector of the MAU may be defective. Move the station’s cable to another MAU port that is known to work.

Heavy network traffic

The Activity LED may remain off longer than expected. Wait for network traffic to subside.

Insertion at the wrong speed

The system may have attempted to enter the token ring network at the wrong speed. Check the setting of the ring speed for path 1. Boundary Router users may use the System Configuration menu to set the token ring speed. Full router users use SHow !1 -PATH BAud. Also, check the path to make sure that it is enabled (SHow !1 -PATH CONTrol).

Duplicate node address

Check to make sure that the MAC address of the system on your network is unique.

Token ring experiencing network error recovery

The Activity LED may remain off longer than expected. Wait for normal token ring operation after an automatic error recovery.

If none of these actions solves your problem, contact your network supplier.

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