Is it a right way to supernet/range in OSPF for the following network address?

area 0.0.0.x 

How can have a subnet of, e.g. /24?

Is this a right thing to do?

I thought the right subnet should be, e.g. /16?

Am I correct on this?

  • Basically, my question is about supernetting , is it correct to supernet the network of with a subnet of 24? Shouldn't that be a subnet of 16?
    – dexterous
    Oct 29, 2017 at 23:22
  • A supernet is combining two or more networks into a smaller prefix. If you have If you have some larger prefixes, e.g. /25, you can combine them to a supernet with any smaller prefix, e.g. /22. I think you need to study the excellent answer to this question.
    – Ron Maupin
    Oct 29, 2017 at 23:25
  • To avoid confusion, better enable OSPF per interface.
    – manish ma
    Oct 30, 2017 at 9:35

1 Answer 1


Depending on what your underlying network sizes are, you can aggregate them to a prefix smaller than what you started with. For example, if you have these networks:


You can aggregate them into

Don't get hung up on the octets, which are simply to make it easier for humans to read. You need to do IP manipulation in binary.

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