Instruction manual

Using the BayStack Model 350T 10/100 Autosense Switch
4-4 893-00992-A
Port Connection Problems
Port connection problems can usually be traced to a bad connection or to an
improper connection of the port cables at either end of the link. These types of
problems can be remedied by checking 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 related to the following areas:
• Port interface
• Autonegotiation modes
Port Interface
Check that the appropriate crossover or straight-through cables are implemented
between the connected devices (see “
MDI and MDI-X Devices” in 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 350T 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 at full-duplex mode.
Diagnostic LED is off. A fatal error was detected by
the self-test.
Cycle power to the switch (disconnect and then
reconnect the AC power cord).
If the problem persists, replace the switch.
Diagnostic LED is
blinking.
A nonfatal error occurred
during the self-test.
Cycle power to the switch (disconnect and then
reconnect the AC power cord).
If the problem persists, contact Bay Networks
customer support.
Table 4-2. Corrective action table (continued)
Symptom Probable Cause Corrective Action
BOOK.MKR Page 4 Tuesday, March 4, 1997 7:24 PM