Command:

interface


Mode:

Router(config)#

Syntax:

interface type number
interface type slot/port    
interface [type slot/port-adapter/port] [ethernet | serial]  (for ports on VIP cards in the Cisco 7500 series routers)
interface serial slot/port:channel-group  (for channelized T1 or E1 on Cisco 7500 series  routers)
interface serial number:channel-group  (for channelized T1 or E1 on the Cisco 4000 series routers and the Cisco MC3810)

To configure a subinterface, use this form of the interface global configuration commands:

interface type slot/port-adapter/port.subinterface-number {multipoint | point-to-point}
(for ports on VIP cards in the Cisco 7500 series routers)
interface type slot/port.subinterface-number {multipoint | point-to-point} (for the Cisco  7200
series routers)
interface type slot/port-adapter.subinterface-number {multipoint | point-to-point}  (for the Cisco  7500 series)
Syntax Description:

type

Type of interface to be configured

number

This specifies a port, connector, or interface card number. On a Cisco 4000 series router, it specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command.

slot

Refer to the appropriate hardware manual for slot and port information.

port

Refer to the appropriate hardware manual for slot and port information.

port-adapter

Refer to the appropriate hardware manual for information about port adapter compatibility.

:channel-group

The Cisco 4000 series routers specifies the T1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command. On a dual port card, it is possible to run channelized on one port and primary rate on the other port.

The Cisco MC3810 specifies the T1/E1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command.

.subinterface-number

This specifies the subinterface number in the range 1 to 4294967293. The number that precedes the period (.) must match the interface number to which this subinterface belongs.

multipoint | point-to-point

(Optional) This specifies a multipoint or point-to-point subinterface. There is no default.


Command Description:

Use the interface global configuration command to configure an interface type and enter interface configuration mode.


Example:

The following will move the router prompt from the global config to the interface config mode. 

Router(config)#interface ethernet  0

Misconceptions:
None

Related Commands:
description
bandwidth
ip address
clock rate

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