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Ip addresses

moses12315
Level 1
Level 1

‎10-22-2007 06:53 AM - edited ‎03-05-2019 07:14 PM

Can we use the ip address 192.168.2.1/16 or 172.16.1.1/8 and if yes what's the purpose of the Classes of ip addresses, A,B,C.

Thanks

moses

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Richard Burts
Hall of Fame
Hall of Fame

‎10-22-2007 07:34 AM

moses

It depends somewhat on how your router (or switch) is configured. But in general the IOS does not have a problem with 192.168.x.x/16 or with 172.x.x.x/8. These are both examples of what is generally called a supernet. A supernet applies a mask to addresses that is shorter than the "natural" or default mask for a network. supernet is one of the concepts of CIDR (Classless InterDomain Routing).

The specification and use of Class A, Class B, and Class C addresses is an older way of organizing and managing IP addresses. CIDR is a newer way or organizing and managing IP addresses and it is one component of classless routing, which is the newer and more sophisticated approach to IP routing.

HTH

Rick

HTH

Rick
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