Cisco Systems OL-6426-02 Benutzerhandbuch

The wireless interface enables connection to the router through a wireless LAN connection. For more 
information about configuring a wireless connection, see 

 and the 

.

The loopback interface acts as a placeholder for the static IP address and provides default routing 
information.

For complete information on the loopback commands, see the Cisco IOS Release 12.3 
documentation set. 

Perform these steps to configure a loopback interface:

The loopback interface in this sample configuration is used to support Network Address Translation 
(NAT) on the virtual-template interface. This configuration example shows the loopback interface 
configured on the Fast Ethernet interface with an IP address of 200.200.100.1/24, which acts as a static 
IP address. The loopback interface points back to virtual-template1, which has a negotiated IP address. 

!

interface loopback 0

ip address 200.200.100.1 255.255.255.0 (static IP address)

ip nat outside

!

interface Virtual-Template1

ip unnumbered loopback0

no ip directed-broadcast

ip nat outside

interface type number

Router(config)# interface Loopback 0

Router(config-int)# 

Enters interface configuration mode.

ip address ip-address mask

Router(config-int)# ip address 10.108.1.1 

Router(config-int)# 

Sets the IP address and subnet mask for the 
loopback interface.

Router(config-int)# exit

Router(config)# 

Exits configuration mode for the loopback 
interface and returns to global configuration 
mode.