Ip address overlaps with VLSM

From: Bhisham Bajaj (bhishambajaj@xxxxxxxxx)
Date: Tue Jan 08 2002 - 16:02:26 GMT-3


   
I am trying to give a ip add to two different
interface with different mask

S0
R1(config-if)#ip address 172.1.89.1 255.255.225.0

S1

R1(config-if)#ip address 172.1.88.1 255.255.224.0

******* 172.1.64.0 overlaps with Serial0 ********

( ****** the output that I get as u put in the command
********)

now I know the network address is 64 and the network
first 3 bit are 010
that is same to the s0 first 3 bit 010

I try it wth all the address that have the first 3
bit different and it works

S1

R1(config-if)#ip address 172.1.96.1 255.255.224.0

And it works the first 3 bit = 011

Know some how I am not able to understand why is it
doing so when I am using different mask

The network address is also no all 0000000 so it
cannot be the ip subnet-zero thing

But there is some thing got to do with the same
network bits with a different mask

What is it can some one help me on this

I am spending a lot of time on things like this
would it pay back ?

Thank u

Bhisham



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