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 Post subject: What is the Use of Loop back adapter in cisco router?
PostPosted: Wed Jun 30, 2010 4:03 pm 
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Joined: Thu Mar 11, 2010 7:39 am
Posts: 145
Location: India Hyderabad
Hi every body !

what is the use of loop back adapter in cisco router ? in some topologies many loop back address es are configured i am not understand the particular use of loop back address

can any body help me !!!!


Thank you..




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 Post subject: Re: What is the Use of Loop back adapter in cisco router?
PostPosted: Wed Jun 30, 2010 4:37 pm 
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Joined: Mon Oct 13, 2008 11:26 am
Posts: 817
Location: Finland
Loopback is a logical interface inside router. It can't be connected to any other device.

Loopback is used in many different cases:
  • Router ID for many routing protocols
  • To simulate "Remote" networks when testing routing
  • To get one management IP for router. Loopback is always up and therefore reachable if at least one physical interface is up.
  • etc...



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