ip unnumbered

Last Updated : Oct 26, 2015 |

Specifies an interface from which to borrow an IP address. Use the no form of the command to delete an unnumbered IP configuration on the interface.

Syntax

[no] ip unnumbered indexinterface-typeidentifier

Parameters

Parameter

Description

Possible Values

Default Value

index

An arbitrary index for the unnumbered interface configuration

1-255

interface-type

The interface type of the interface from which to borrow an IP address

FastEthernet

Vlan

Loopback

Tunnel

Dialer

identifier

The identifier depends on the interface type:

For FastEthernet: module/port

For Vlan: vlan-id

For loopback: loopback number

For Tunnel: tunnel number

For Dialer: dialer number

For FastEthernet: 10/2

For VLAN: 1-4090

For Loopback: 1-99

For Tunnel: 1-50

For Dialer: 1

Context

interface:FastEthernet (PPP L2-L3), Tunnel (L2-L3), Dialer (L2-L3)

User level

read-write

Example

To borrow an IP address from Loopback 1:

Gxxx-001(super-if:Dialer 1)# ip unnumbered 1 loopback 1