Re: How to check the Subnets/Network in Summary Address

Hi Roy,

This is a supernet address where you are summarising a block of Class C
addresses.

The summary address of 192.168.10.0/21 falls within the boundry of
192.168.8.0 - 192.168.15.255 class C's

You have borrowed 5 bits from the 3rd octed i,e 2 ^5 - 2 = 30 subnets.

256 - 248 = 8. So count 8 16 24 32 40 48 etc...will give you the different
blocks.

I hope that this helps.

Kind Regards

Byron Chen

On 18 May 2011 18:04, <roykhan123_at_hotmail.com> wrote:

> Hi Guys
>
> I Have a question Please tell me If i have a Summary Address how i will
> calculate which Network include in it.
> For example If i say , I have a summary address of 192.168.10.0/21 and i
> tell
> you
> how many subnets or network contain in this address how you will calculate
> it
> Pls if any one knows the short cut reply to that email.
>
> the below are the summary addresses.
> 1. 192.168.10.0/21
> 2. 192.168.16.0 255.255.248.0
>
> Br
>
> Roy
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Thu May 19 2011 - 16:53:59 ART