Configuring Switch Port Speed and Duplex Setting

Note

For information about displaying port speed, duplex, autonegotiation, and flow control settings, see Displaying Port Information.

Note

Stacking ports always use the same type of connector and copper PHY, which are built in to the ExtremeSwitching switches. You cannot configure stacking port parameters such as port speed, duplex, and link fault signal. You also cannot configure data port features such as VLANs and link aggregation.

Autonegotiation determines the port speed and duplex setting for each port (except 10 and 40 Gbps ports). You can manually configure the duplex setting and the speed of 10/100/1000 Mbps ports.

The 10/100/1000 Mbps ports can connect to either 10BASE-T, 100BASE-T, or 1000BASE-T networks. By default, the ports autonegotiate port speed. You can also configure each port for a particular speed (either 10 Mbps or 100 Mbps).

Note

With autonegotiation turned off, you cannot set the speed to 1000 Mbps.

In general, SFP gigabit Ethernet ports are statically set to 1 Gbps, and their speed cannot be modified.

However, there are two SFPs supported by Extreme that can have a configured speed:

• 100 FX SFPs, which must have their speed configured to 100 Mbps.
• 100FX/1000LX SFPs, which can be configured at either speed.

The 10 Gbps ports always run at full duplex and 10 Gbps. The 40 Gbps ports always run at full duplex and 40 Gbps.

ExtremeXOS allows you to specify the medium as copper or fiber when configuring ExtremeSwitching switches with combination ports. If the medium is not specified for combination ports then the configuration is applied to the current primary medium. The current primary medium is displayed in the Media Primary column of the show ports configuration command output.

Note

For switches that do not support half-duplex, the copper switch ports must have autonegotiation disabled and full duplex enabled when connecting 10/100/1000 Mbps devices that do not autonegotiate. If the switch attempts and fails to auto negotiate with its partner, it will fail to link up. A non-negotiating connected device must also be manually configured for full duplex or packet loss and port errors will occur each time it detects a collision.

To configure port speed and duplex setting , use the following command:

configure ports port_list {medium [copper | fiber]} auto off speed speed duplex [half | full]

To configure the system to autonegotiate, use the following command:

configure ports port_list {medium [copper|fiber]} auto on {[{speed speed} {duplex [half | full]}] | [{duplex [half | full]} {speed speed}]}

Note

The keyword medium is used to select the configuration medium for combination ports. If port_list contains any non-combination ports, the command is rejected.

ExtremeXOS does not support turning off autonegotiation on the management port.