loopback address

[gau1acr01]

im just a novice on networking, anyone can explain to me of what is a loopback address? what type of ip address i will use? what's the main use of loopback adr.?

[Georg Pauwen]

Hello,

a loopback interface (and corresponding address) has no hardware associated with it, and it is not physically connected to a network. Since there is no physical interface associated with the loopback address, it can only go down when the entire device goes down. On a Cisco router, loopback addresses are typically (a.o.)used for routing protocols such as OSPF, EIGRP, and BGP, which make use of an IP address for identification purposes.

You can configure the loopback interface and address as following:

interface Loopback0

ip address 1.1.1.1 255.255.255.255

HTH,

GP

[a.kachroo]

Loobback Interface is configured just for management sake and for this u have to configure ip address which should be like 192.168.100.100 255.255.255.255.

As this interface never go down so,it is used for accessing routers.