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Command Reference Guide Loopback Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 993
ip address <address> <mask> secondary
Use the ip address command to define an IP address on the specified interface. Use the optional
secondary keyword to define a secondary IP address. Use the no form of this command to remove a
configured IP address.
Syntax Description
<address> Defines the IP address for the interface in dotted decimal notation (for example:
192.22.73.101).
<mask> Specifies the subnet mask that corresponds to the listed IP address.
secondary
Optional. Configures a secondary IP address for the specified interface.
Default Values
By default, there are no assigned IP addresses.
Applicable Platforms
This command applies to the NetVanta 300, 1000, 1000R, 2000, 3000, 4000, and 5000 and
Total Access 900 Series units.
Command History
Release 1.1 Command was introduced.
Release 2.1 Added ip address dhcp for DHCP client support.
Functional Notes
Use secondary IP addresses to allow dual subnets on a single interface (when you need more IP
addresses than the primary subnet can provide). When using secondary IP addresses, avoid routing loops
by verifying that all devices on the network segment are configured with secondary IP addresses on the
secondary subnet.
Usage Examples
The following example configures a secondary IP address of 192.22.72.101/30:
(config)#interface loopback 1
(config-loop 1)#ip address 192.22.72.101 255.255.255.252 secondary