[nsp] Duplicated IP address

From: Juan (wenxuecity2001@yahoo.com)
Date: Wed Jul 10 2002 - 17:12:23 EDT

I just noticed that we can configure duplicated ip
address on serial interfaces like this:

!
interface Serial0/0
 ip address 192.0.9.1 255.255.255.0
!
interface Serial0/1
 ip address 192.0.9.1 255.255.255.0
!

The routing table shows two routes and it will load
balance the outbound packets

...
C 192.0.9.0/24 is directly connected, Serial0/1
                  is directly connected, Serial0/0

Why is this allowed? I tried this on p2p ATM
interface, it complained about overlapping
address(which sounds right to me). Is there any
legitimate use for this?

Thanks
Juan

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