334 Chapter 6 Troubleshooting208700-BIn both situations, the Business Policy Switch “autosenses” the speed of theconnected station and, by default, reverts to half-duplex mode. If the connectedstation is operating in full-duplex mode, it cannot communicate with the switch.To correct this mode mismatch problem:1 Use the Port Configuration screen to disable autonegotiation for the suspectport (see Chapter 3).2 Manually set the Speed/Duplex field to match the speed/duplex mode of theconnected station (see Chapter 3).You may have to try several settings before you find the correct speed/duplexmode of the connected station.If the problem persists:1 Disable the autonegotiation feature at the connected station.2 Manually set the speed/duplex mode of the connected station to the samespeed/duplex mode you have manually set for the Business Policy Switchport.Port interfaceEnsure that the devices are connected using the appropriate crossover orstraight-through cable (see Appendix F).Note: Nortel Networks recommends that you manually set the BusinessPolicy Switch port to the desired speed/duplex mode when you connectto any of the following Nortel Networks products:• BayStack 450 product family• BayStack 410 product family
