By default, all ports on a switch are enabled, and port parameters are set with initial values. The Port Settings window displays these values and lets you change them. To display the Port Settings window, choose Port > Port Settings.
Some port types automatically negotiate configuration settings. An autonegotiation mismatch can occur under these conditions:
The result of a mismatch on Fast Ethernet ports is reduced performance or link errors. On Gigabit Ethernet ports, the link does not come up, and no statistics are reported.
To correct mismatched port settings, follow one of these suggestions:
Note: To connect to a remote Fast Ethernet device that does not autonegotiate, you should explicitly set the duplex on the local device to a value other than Auto. Speed negotiation works even if the other device does not autonegotiate. To connect to a remote Gigabit Ethernet device that does not autonegotiate, disable autonegotiation on the local device and set the duplex and flow control parameters to be compatible with the remote device.