The Nterface [Interface Type] [Interface Number] Cisco command

Command

interface [interface_type] [interface_number]

Syntax

interface [interface_type interface_number]

Description

The 'interface [interface_type] [interface_number]' command is used to enter configuration mode for a specific interface on a Cisco router or switch. This command allows network administrators to configure the properties and parameters of the specified interface, such as IP address, subnet mask, and encapsulation type.

Usage

To use the interface command, follow these steps:

1. Enter the 'en' (enable) command to enter enable mode.
2. Use the 'interface [interface_type] [interface_number]' command to enter interface configuration mode. The interface type and interface number must be specified.
3. Configure the desired interface settings using the available configuration commands.
4. Use the 'exit' command to exit interface configuration mode and return to enable mode.

Equipment Compatibility

The interface command can be used on a wide range of Cisco routers and switches, including:

• Catalyst series switches
• Nexus series switches
• Integrated Services Routers (ISRs)
• ASR series routers
• ISR G2 series routers
• CRS routers

Additional Information

• The interface command supports a variety of interface types, including ethernet, serial, and virtual interfaces.
• The interface command can be used to configure interface settings such as IP address, subnet mask, encapsulation type, and duplex mode.
• The interface command can also be used to enable or disable interfaces and to set the interface description.
• The interface command is a powerful tool for managing and configuring interfaces on Cisco devices.

nterface [interface_type] [interface_number] Usage Examples

Interface Types:

• Ethernet: Used for connecting to wired networks.
• Serial: Used for connecting to serial devices like dial-up modems.
• Loopback: Used for testing purposes.
• Tunnel: Used for creating virtual connections over a network.
• VLAN: Used for creating virtual networks within a physical network.

Interface Numbers:

• Physical Interfaces: These are physical ports on the device, such as Ethernet ports or serial ports. The interface number for a physical interface is typically the same as the port number.
• Virtual Interfaces: These are logical interfaces that are created on top of physical interfaces. Virtual interfaces are often used to create VLANs or tunnel connections. The interface number for a virtual interface is typically a higher number than the interface number for a physical interface.

Examples:

• interface ethernet 0/1: This command specifies the Ethernet interface with the interface number 0/1.
• interface serial 0/0: This command specifies the serial interface with the interface number 0/0.
• interface loopback 0: This command specifies the loopback interface with the interface number 0.
• interface tunnel 0: This command specifies the tunnel interface with the interface number 0.
• interface vlan 10: This command specifies the VLAN interface with the interface number 10.