Administrator Guide

Routing Interfaces 1155
Configuring Loopback Interfaces
Beginning in Privileged EXEC mode, use the following commands to
configure a loopback interface.
Command Purpose
configure Enter Global Configuration mode.
interface loopback
loopback-id
Create the loopback interface and enter Interface
Configuration mode for the specified loopback
interface.
ip address
ip_address
subnet_mask [secondary]
Configure a static IP address and subnet mask. Use the
secondary keyword to specify that the address is a
secondary IP address.
CTRL + Z Exit to Privileged EXEC mode.
show ip interface loopback
loopback-id
View interface configuration information for the
specified loopback interface.