ADTRAN 1000R Series

Command Reference Guide Loopback Interface Configuration Command Set

ip unnumbered <interface>

Use the ip unnumbered command to use the IP address assigned to the specified interface for all IP

processing on the active interface. Use the no form of this command to remove the unnumbered

configuration.

Syntax Description

<interface> Spe cifies the interface in the format type slot/port (e.g., ppp 1) that contains the

IP address to be used as the source address for all packets transmitted on this

interface. Enter ip unnumbered ? for a complete list of valid interfaces.

Default Values

By default, all interfaces are configured to use a specified IP address (using the ip address command).

Applicable Platforms

This command applies to the NetVanta 300, 1000, 1000R, 2000, 3000, 4000, and 5000 and

Total Access 9 00 Series units.

Command History

Release 1.1 Command was introduced.

Release 11.1 Command was expanded to include demand interfaces.

Functional Notes

If ip unnumbered is enabled on an interface, all IP traffic from the interface will use a source IP address

taken from the specified interface. For example, specifying ip unnumbered ppp 1 while in the Ethernet

Interface Configuration mode configures the Ethernet interface to use the IP address assigned to the PPP

interface for all IP processing. In addition, the AOS uses the specified interface information when sending

route updates over the unnumbered interface.

Usage Examples

The following example configu res the loopback interface (labeled loop 1) to use the IP address assigned

to the PPP interface (ppp 1):

(config)#interface loopback 1

(config-loop 1)#ip unnumbered ppp 1