Interface Configuration Commands I Interface Configuration Commands Table of Contents Chapter 1 Interface Configuration Commands............................................................................................ 1 1.1 Interface Configuration Commands................................................................................................1 1.1.1 interface...................................................................................................................................1 1.1.2 Description.............................................................................................................................. 2 1.1.3 bandwidth................................................................................................................................3 1.1.4 delay.........................................................................................................................................3 1.1.5 shutdown.................................................................................................................................4 1.1.6 show interface........................................................................................................................ 5 1.1.7 show running-config interface..............................................................................................6 1.2 Configuration Example......................................................................................................................7 II Interface Configuration Commands Chapter 1 Interface Configuration Commands 1.1 Interface Configuration Commands The interface configuration commands include:  interface  description  bandwidth  delay  shutdown  show interface  show running-config interface 1.1.1 interface Syntax To enter the interface configuration mode, run this command. If the logical port is inexistent, you have to create this port first and then enter the port mode. If the physical port is inexistent, the command will fail to be executed. The negative form of this command has different functions for the physical port and the logical port. [no] interface port To return to the default settings of the physical port, run this command. no interface physical-port To delete the logic interface, run this command. no interface logical-port Parameters Parameters Description Port Stands for the existent physical or logical port. Default Value The default mode is not the port mode. 1 Interface Configuration Commands Usage Guidelines When you execute this command in configuration mode, you have to enable this command to be in port configuration mode first. When the port command is configured, you shall use the exit command to exit from the port mode. Example The following example shows how to enter the port mode of port g0/1. Switch_config# Switch_config#interface gigaEthernet0/1 Switch_config_g0/1#exit Switch_config# 1.1.2 Description Syntax To set the description information of a port, run the following command. [no] description line Parameters Parameters Description Stands for the character string of the description information, line among which space may exist. Default Value There is no description information by default. Usage Guidelines The command must be configured in port configuration mode. Example The following example shows how to set the description information of port g01/1 to up link. Switch_config# interface gigaEthernet0/1 Switch_config_g0/1# description uplink 2 Interface Configuration Commands 1.1.3 bandwidth Syntax To set the bandwidth of an interface, run the following command. [no] bandwidth kilobps Parameters Parameters Description kilobps port bandwidth, the value ranges from 1 to 10000000(kbps). Default Value The default value of the 100M port is 100000 and the default value of gigabit port is 1000000. Usage Guidelines The command must be configured in port configuration mode. Note: The configured bandwidth does not mean the actual bandwidth of a port, but is used by some protocol to calculate the port cost. Example The following example shows how to set port g0/1 to 10000000. Switch_config # interface gigaEthernet0/1 Switch_config_g0/1# bandwidth 10000000 1.1.4 delay Syntax To set the delay of an interface, run the following command. [no] delay tensofmicroseconds Parameters Parameters Description 3 Interface Configuration Commands tensofmicroseconds port delay, the value ranges from 1 to 10000000 (10 microseconds) Default Value The default value of the delay is 1. Usage Guidelines This command is configured in port configuration mode. Example The following example shows how to set the delay of an interface to 10. Switch_config_g0/1# delay 10 1.1.5 shutdown Syntax To enable the port, run this command. [no] shutdown Parameters None Default Value The physical port is in enabled shutdown status by default. Usage Guidelines This command can be used in port mode to enable or disable port. Example The following example shows how to enable port g0/1. Switch_config_g0/1# Switch_config_g0/1# no shutdown Switch_config_g0/1# 4 Interface Configuration Commands 1.1.6 show interface Syntax To browse the state of an interface, run the following command. show interface Parameters Parameters Description Port Name of an interface If a specific port is not in the command, the system will show the statuses of all ports. Default Value None Usage Guidelines This command can be used in EXEC and configuration modes to show the physical status and packet reception statistics of a port. Example The following example shows the information about port g0/1: Switch_config# show interface gigaEthernet 0/1 GigaEthernet0/1 is administratively down, line protocol is down Hardware is Giga-Combo-FX, address is 00e0.0fe4.d083 (bia 00e0.0fe4.d083) MTU 1500 bytes, BW 1000000 kbit, DLY 10 usec Encapsulation ARPA Auto-duplex, Auto-speed flow-control off 5 minutes input rate 0 bits/sec, 0 packets/sec 5 minutes output rate 0 bits/sec, 0 packets/sec Received 0 packets, 0 bytes 0 broadcasts, 0 multicasts 0 discard, 0 error, 0 PAUSE 0 align, 0 FCS, 0 symbol 0 jabber, 0 oversize, 0 undersize 0 carriersense, 0 collision, 0 fragment 0 L3 packets, 0 discards, 0 Header errors Transmited 0 packets, 0 bytes 0 broadcasts, 0 multicasts 0 discard, 0 error, 0 PAUSE 5 Interface Configuration Commands 0 sqettest, 0 deferred 0 single, 0 multiple, 0 excessive, 0 late 0 L3 forwards 1.1.7 show running-config interface Syntax To display the settings of a port, run the following command. show running-config interface port Parameters Parameters Description Port Stands for the existent port. Default Value None Usage Guidelines This command can be executed in EXEC or configuration mode to browse the settings of a port. Example The following example shows the settings of port g0/1: Switch_config#show running-config interface g0/1 Building configuration... Current configuration: ! interface GigaEthernet0/1 shutdown description uplink bandwidth 10000000 delay 10 Switch_config# 6 Interface Configuration Commands 1.2 Configuration Example The following example shows how to create a VLAN port, set its description information and IP address and browse the status and settings of this port. To browse the port status and configuration, run show command. Switch_config# Switch_config# interface vlan1 Switch_config_v1# description uplink Switch_config_v1# Switch_config_v1# ip address 192.168.1.1 255.255.255.0 Switch_config_v1# exit Switch_config# Switch_config# show running-config interface vlan1 Building configuration... Current configuration: ! interface VLAN1 description uplink ip address 192.168.1.1 255.255.255.0 Switch_config# show interface vlan1 VLAN1 is up, line protocol is down Description: uplink Hardware is EtherSVI, Address is 00e0.0fe4.d06a(00e0.0fe4.d06a) Interface address is 192.168.1.1/24 MTU 1500 bytes, BW 1000000 kbit, DLY 2000 usec Encapsulation ARPA ARP type: ARPA, ARP timeout 04:00:00 Peak input rate 0 pps, output 0 pps 0 packets input, 0 bytes Received 0 broadcasts, 0 multicasts 7 Interface Configuration Commands 0 mpls unicasts, 0 mpls multicasts, 0 mpls input discards 0 input errors, 0 input discards 0 packets output, 0 bytes Transmited 0 broadcasts, 0 multicasts 0 mpls unicasts, 0 mpls multicasts, 0 mpls output discards 0 output errors, 0 discards Switch_config# 8