Supernetting

Question

I have doubt that how to merge the ip addresses into single one using Aggregation. Please discuss the approach

Like I have ip addresses 192.24.0.0/21,192.24.16.0/20,192.24.8.0/22

It's merged into single one ip 192.24.0.0/19

How, I am little confused with the approach help me out here :)

Comments

I've not come across a straight forward method to do so.

What I do is, write the addresses in the binary form.

Now start matching the addresses from left upto the point where all the given addresses agree to be equal.

Count the nber of bits of the matching, which will be the new mask.

In their case,

(I'm expanding just the last two octets, as 192.24 is common to all)

.00000000.00000000/21

.00010000.00000000/20

.00001000.00000000/22

 

We can clearly see that they are matching upto .000

After counting, 8+8(of 192.24) + 3= 19.

Which would be new mask. And address would be 192.24.0.0/19

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Explained Clearly

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@aambazinga

Perfect One, You should post it as answer as well.