From: Annu Roopa (annu_roopa@xxxxxxxxx)
Date: Tue Jan 08 2002 - 18:24:11 GMT-3
Hi,
The error message as it indicates is bcoz of
overlapping address which means in use already.Why do
u want to use 225 mask as u are not getting any major
benefit from it ? Anyway
Based on ur mask the 172.16.89.1 255.255.225.0 the
address is on subnet 65.
Ur second address is 172.1.88.1 255.255.224.0 which
leads to following subnets and hosts
172.16.64 with hosts from 172.16.65.1 to 172.16.65.254
172.16.64 with hosts from 172.16.66.1 to 172.16.66.254
and so on and includes hosts from 172.16.95.1 to
172.16.95.254.
If u see it includes 172.1.89.1 which is already used
and "hence overlaps".Thats why it gives u this error
message.
HTH.Let me kniw if i am not clear.someone coreect me
if i am wrong.
Annu.
> -----Original Message-----
> From: Bhisham Bajaj [mailto:bhishambajaj@yahoo.com]
> Sent: Tuesday, January 08, 2002 2:02 PM
> To: ccielab@groupstudy.com
> Subject: Ip address overlaps with VLSM
>
>
> 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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