Bay Technical Associates 350 Port Connection Problems, Port Interface, Autonegotiation Modes

Troubleshooting

Table 4-2. Corrective actions

Symptom Probable Cause Corrective Action

Diagnostics LED is off. A fatal error was detected by the self-test.

Cycle the power to the switch (disconnect and then reconnect the AC power cord).

If the problem persists, replace the switch.

Diagnostics LED is	A nonfatal error occurred	Cycle the power to the switch (disconnect and
blinking.	during the self-test.	then reconnect the AC power cord).
		If the problem persists, contact the Bay Networks
		Technical Solutions Center.

Port Connection Problems

Port connection problems can usually be traced to a poor cable connection or an improper connection of the port cables at either end of the link. These types of problems can be remedied by making sure that the cable connections are secure and that the cables are connected to the correct ports at both ends of the link.

Other problems can be traced to the port interface or the autonegotiation mode.

Port Interface

Ensure that the devices are connected using the appropriate crossover or straight-through cable (see Appendix B, “Connectors and Pin Assignments”).

Autonegotiation Modes

Port connection problems can occur when a port is connected to a station that is not operating in a compatible mode (for example, connecting a full-duplex port to a half-duplex port). The BayStack 350 switch negotiates port speeds according to the IEEE 802.3u autonegotiating standard. The switch adjusts (autonegotiates) its port speed and duplex mode to match the best service provided by the connected station, up to 100 Mb/s in full-duplex mode.

•If the connected station uses a form of autonegotiation that is not compatible with the IEEE 802.3u autonegotiating standard, the connected stations cannot negotiate a compatible mode for correct operation.

893-00992-B 4-5