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Command Reference Guide
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>
Default Values
By default, all interfaces are configured to use a specified IP address (using the ip address command).
Command History
Release 1.1
Release 11.1
Release A4.01
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
Point-to-Point Protocol (PPP) interface for all IP processing. In addition, AOS uses the specified interface
information when sending route updates over the unnumbered interface.
Usage Examples
The following example configures 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
60000CRG0-35E
Specifies an interface in the format <interface type [slot/port |
slot/port.subinterface id | interface id | interface id.subinterface id | ap |
ap/radio | ap/radio.vap]>. For example, for a T1 interface, use t1 0/1; for an
Ethernet subinterface, use eth 0/1.1; for a PPP interface, use ppp 1; for an
ATM subinterface, use atm 1.1; and for a wireless virtual access point, use
dot11ap 1/1.1. Type ip unnumbered ? for a complete list of valid
interfaces.
Command was introduced.
Command was expanded to include the demand interfaces.
Command was expanded to include the Metro Ethernet Forum (MEF) Metro
Ethernet interface.
Copyright © 2012 ADTRAN, Inc.
Loopback Interface Command Set
2430
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