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.
Prolog information
Metadata
Keywords:

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