Nortel Networks 350 manual Port Connection Problems, Autonegotiation Modes

Using the BayStack 350 10/100/1000 Series Switch

Table 4-2. Corrective Actions (continued)

Symptom Probable cause Corrective action

The Status 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.

The Status 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.
When connecting a	This is a normal condition.	Press [Cntrl]-C to refresh the screen.
console/terminal to an
operating switch through
the switch’s serial
Comm Port, the
console/terminal
displays a blank screen.

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.

Port connection problems can also be traced to the autonegotiation mode or the port interface.

Autonegotiation Modes

Port connection problems can occur when a port (or station) is connected to another port (or station) that is not operating in a compatible mode (for example, connecting a full-duplex port on one station to a half-duplex port on another station).

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.

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