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Command Reference Guide
ip address <ipv4 address> <subnet mask>
Use the ip address command to define an Internet Protocol version 4 (IPv4) address on the specified
interface. Use the optional secondary keyword to define a secondary IPv4 address. Use the no form of this
command to remove a configured IPv4 address. Variations of this command include:
ip address <ipv4 address> <subnet mask>
ip address <ipv4 address> <subnet mask> secondary
Syntax Description
<ipv4 address>
<subnet mask>
secondary
Default Values
By default, there are no assigned IPv4 addresses.
Command History
Release 1.1
Release 2.1
Functional Notes
Use secondary IPv4 addresses to allow dual subnets on a single interface (when you need more IP
addresses than the primary subnet can provide). When using secondary IPv4 addresses, avoid routing
loops by verifying that all devices on the network segment are configured with secondary IPv4 addresses
on the secondary subnet.
Usage Examples
The following example configures a secondary IPv4 address of 192.22.72.101 255.255.255.252:
(config)#interface loopback 1
(config-loop 1)#ip address 192.22.72.101 255.255.255.252 secondary
60000CRG0-35E
Specifies a valid IPv4 address. IPv4 addresses should be expressed in
dotted decimal notation (for example, 10.10.10.1).
Specifies the subnet mask that corresponds to a range of IPv4 addresses
(network) or a specific host. Subnet masks can be expressed in dotted
decimal notation (for example, 255.255.255.0) or as a prefix length (for
example, /24).
Optional. Configures a secondary IPv4 address for the specified interface.
Command was introduced.
Added ip address dhcp for Dynamic Host Configuration Protocol (DHCP)
client support.
Copyright © 2012 ADTRAN, Inc.
Loopback Interface Command Set
2398
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