HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP Co - Page 112
duplex
View all HP Cisco Catalyst Blade Switch 3020 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 112 highlights
duplex Chapter 2 Cisco Catalyst Blade Switch 3020 for HP Cisco IOS Commands duplex Use the duplex interface configuration command to specify the duplex mode of operation for a port. Use the no form of this command to return the port to its default value. duplex {auto | full | half} no duplex Syntax Description auto full half Enable automatic duplex configuration; port automatically detects whether it should run in full- or half-duplex mode, depending on the attached device mode. Enable full-duplex mode. Enable half-duplex mode (only for interfaces operating at 10 or 100 Mbps). You cannot configure half-duplex mode for interfaces operating at 1000 or 10,000 Mbps. Defaults The default is auto for Gigabit Ethernet ports. Duplex options are not supported on the 1000BASE-x (where -x is -SX) SFP modules. For information about which SFP modules are supported on your switch, see the product release notes. Command Modes Interface configuration Command History Release 12.2(25)SEF Modification This command was introduced. Usage Guidelines For Gigabit Ethernet ports, setting the port to auto has the same effect as specifying full if the attached device does not autonegotiate the duplex parameter. Note Half-duplex mode is supported on Gigabit Ethernet interfaces if the duplex mode is auto and the connected device is operating at half duplex. However, you cannot configure these interfaces to operate in half-duplex mode. Certain ports can be configured to be either full duplex or half duplex. Applicability of this command depends on the device to which the switch is attached. If both ends of the line support autonegotiation, we highly recommend using the default autonegotiation settings. If one interface supports autonegotiation and the other end does not, configure duplex and speed on both interfaces; do use the auto setting on the supported side. If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed setting and then forces the speed setting to the negotiated value. The duplex setting remains as configured on each end of the link, which could result in a duplex setting mismatch. You can configure the duplex setting when the speed is set to auto. 2-84 Cisco Catalyst Blade Switch 3020 for HP Command Reference OL-8916-01