The switch comes with default port settings that should allow you to connect to the Ethernet Ports without any necessary configuration. Should there be a need to change the name of the ports, Port State, negotiation settings or flow control settings etc., you can do this in the Port settings by below commands

Use “back-pressure” command to make port to enable back pressure feature. Use “no” form of this command to disable back pressure feature. The only way to show this configuration is using “show running-config” command.

Syntax	back-pressure no back-pressure
Default	Default back pressure state is enabled.
Mode	Interface Configuration
Example	This example shows how to configure port gi1 and gi2 to be protected port. Switch#configure terminal Switch(config)# interface GigabitEthernet 1 Switch(config-if)# back-pressure Switch(config-if)# no back-pressure

Use “clear interface” command to clear statistic counters on specific ports.

Syntax	clear interfaces{IF_PORTS}counters
Parameter	IF_PORTS Specify port to clear counters
Default	No default value for this command.
Mode	Privileged EXEC
Example	This example shows how to clear counters on port gi1. Switch# clear interfaces gi1 counters This example shows how to show current counters Switch# show interfaces gi1

Use “description” command to give the port a name to identify it easily. If description includes space character, please use double quoted to wrap it. Use “no” form to restore description to empty string.

Syntax	description WORD<1-32> no description
Parameter	WORD<1-32> Specify port description string.
Mode	Interface Configuration
Example	This example shows how to modify port descriptions. Switch#configure terminal Switch(config)# interface GigabitEthernet 1 Switch(config-if)# description userport

Syntax	duplex (auto \| full \| half)
Parameter	auto Specify port duplex to auto negotiation. full Specify port duplex to force full duplex. half Specify port duplex to force half duplex.
Default	Default port duplex is auto
Mode	Interface Configuration
Example	This example shows how to modify port duplex configuration. Switch#configure terminal Switch(config)# interface GigabitEthernet 1 Switch(config-if)# duplex full Switch(config-if)# exit This example shows how to show current interface link speed Switch# show interfaces status

Use “eee” command to make port to enable the energy efficient Ethernet Feature .Use “no” form of this command to disable eee. IEEE 802.3az Energy Efficient Ethernet (EEE) is a standard that allows physical layer transmitters to consume less power during periods of low data activity. The only way to show this configuration is using “show running-config” command.

Syntax	eee no eee
Parameter	None
Default	Default eee state is disabled
Mode	Interface Configuration
Example	This example shows how to configure port gi1 and gi2 to be protected port. Switch#configure terminal Switch(config)# interface GigabitEthernet 1 Switch(config-if)# eee This example shows how to show current jumbo-frmae size Switch# show running-config interface gi1

Use “flowcontrol” command to change port flow control configuration. Use “no” form to restore flow control to default (off) configuration.

Syntax	flowcontrol (auto \| off \| on) no flowcontrol
Parameter	auto Automatically enables or disables flow control on the interface. off Disable port flow control. on Enable port flow control.
Default	Default port flow control is off
Mode	Interface Configuration
Example	This example shows how to modify port duplex configuration. Switch(config)# interface GigabitEthernet 1 Switch(config-if)# flowcontrol on This example shows how to show current flow control configuration Switch# show interfacesGigabitEthernet 1

A jumbo frame is an Ethernet frame with a payload greater than the standard maximum transmission unit (MTU) of 1,500 bytes. Jumbo frames are used on local area networks that support at least 1 Gbps and can be as large as 10,000 bytes. Use “jumbo-frame” command to modify maximum frame size. The only way to show this configuration is using “show running-config” command.

Syntax	jumbo-frame<1518-10000>
Parameter	<1518-10000>Specify the maximum frame size.
Default	Default maximum frame size is 1522.
Mode	Global Configuration
Example	This example shows how to modify maximum frame size on gi1 to 10000 bytes. Switch#configure terminal Switch(config)# jumbo-frame 9216 This example shows how to show current jumbo-frame size Switch# show running-config jumbo-frame 9216

Use “media-type” command to change combo port media type. Use “no” form of this command to restore media type to default.

Syntax	media-type (auto-select \| rj45 \| sfp) no media-type
Parameter	auto-select Select media automatically. rj45 Select copper media. sfp Select fiber media.
Default	Default media type is auto.
Mode	Interface Configuration
Example	This example shows how to modify combo port media type to copper. Switch#configure terminal Switch(config)# interface gi25 Switch(config-if)# media-type rj45

Use “protected” command to make port to be protected. Protected port is only allowed to communicate with unprotected port. In other words, protected port is not allowed to communicate with another protected port. Use “no” form to make port unprotected.

Syntax	protected no protected
Default	Default protected state is no protected.
Mode	Interface Configuration
Example	This example shows how to configure port gi1 and gi2 to be protected port. Switch#configure terminal Switch(config)# interface range gi11-12 Switch(config-if-range)# protected This example shows how to show current protected port state. Switch# show interfaces GigabitEthernet 11-12 protected

Use “show interface” command to show detail port counters, parameters and status. Use “show interface status” command to show brief port status. Use “show interface protected” command to show protected status.

Syntax	show interfaces{IF_PORTS} show interfaces{IF_PORTS} status show interfaces{IF_PORTS} protected
Parameter	{IF_PORTS}Specify port to show.
Mode	Privileged EXEC
Example	This example shows how to show current counters Switch# show interfaces GigabitEthernet 1 This example shows how to show current protected port state. Switch# show interfaces GigabitEthernet 1-2 protected This example shows how to show current port status Switch# show interfaces GigabitEthernet 1-2 status

Use “speed” command to change port speed configuration. The speed is only able to configure to the physical maximum speed. For example, in fast Ethernet port, speed 1000 is not available. You cannot configure the speed on the SFP module ports, but you can configure the speed to not negotiate (nonegotiate) if it is connected to a device that does not support autonegotiation.

Syntax	speed (10 \| 100 \| 1000) speed auto [(10 \| 100 \| 1000 \| 10/100)] speed nonegtiate no speed nonegtiate
Parameter	10 Specify port speed to force 10Mbits/s or auto with 10Mbits/s ability. 100 Specify port speed to force 100Mbits/s or auto with 100Mbits/s ability. 1000 Specify port speed to force 1000Mbits/s or auto with 1000Mbits/s ability. 10/100 Specify port speed to auto with 10Mbits/s and 100Mbits/s
Default	Default port speed is auto with all available abilities.
Mode	Interface Configuration
Example	This example shows how to modify port speed configuration. Switch#configure terminal Switch(config)# interface GigabitEthernet 1 Switch(config-if)# speed 100 Switch# show running-config interfaces GigabitEthernet 1

Use “shutdown” command to disable port and use “no shutdown” to enable port. If port is error disabled by some reason, use “no shutdown” command can also recovery the port manually.

Syntax	shutdown no shutdown
Default	Default port admin state is no shutdown.
Mode	Interface Configuration
Example	This example shows how to modify port duplex configuration. Switch#configure terminal Switch(config)# interface gi1 Switch(config-if)# shutdown This example shows how to show current admin state configuration Switch# show running-config interfaces gi1