Re: Subnetting question

Hi All,

Corrected question on subnetting. We are getting routes:

200.200.0.0 /24
200.200.1.0 /24
200.200.2.0 /24
         -
         -
         -
         -
         -
200.200.19.0 /24
200.200.20.0 /24

Now only routes given below are required with only one statements in your
ACL:

200.200.4.0 /24
200.200.5.0 /24
200.200.6.0 /24
200.200.7.0 /24

and

200.200.12.0 /24
200.200.13.0 /24
200.200.14.0 /24
200.200.15.0 /24

*Answer is : 200.200.4.0 0.0.11.255*

But we are unable to understand the math behind it. Can anyone suggest, how
to find out wil card mast of *0.0.11.255 ??*

Thanks,

Nishant.

On 8/23/09, Federico Cossu <federico.cossu_at_gmail.com> wrote:

> i know the answer! and the answer is:
>
> http://blog.internetworkexpert.com/2008/09/15/binary-math-part-i/
>
>
>
> /R
>
>
>
> 2009/8/23 Naufal Jamal <naufalccie_at_yahoo.in>
>
> > Hi experts,
> >
> > I am receiving the following routes in my router.
> >
> > 192.168.1.0/24
> > 192.168.2.0/24
> > .
> > .
> > .
> > 192.168.20.0/24
> >
> > I want to filter the routes 192.168.4.0/24 - 192.168.9.0/24 and the acl
> > should
> > use the minimum stmts possible.
> >
> > can anyone help??
> >
> > naufal
> >
> >
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> >
>
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>
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Received on Sun Aug 23 2009 - 15:53:33 ART