It is also good for
Setting up a BGP peering session when you have multiple links between the
two routers .
Monitoring a router using an NMS, lets say you want to monitor a router
that has 20 interfaces on it. If you list one of those interfaces as the
primary connection in the NMS config then if that one interface goes down
your NMS may flag that the whole router has gone down; where as if you
monitor the loopback address and an interface goes down, then presumably
routing will get your snmp traffic toand from the router via an alternative
path.
loopbacks are mainly useful in large networks. If you only have one or two
routers to deal with the loopback probably doesn't buy you that much.
Tom
At 11:16 PM 5/23/00 +0800, Jacques Lee wrote:
>What is a loopback interface for, besides the Router ID in OSPF ?
>
>THx
>
>_____________
>Jacques Lee
>CCNA
>
>
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Tom Pruneau
Trainer Network Operations
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