[SUMMARY: 2.5.1 netmasks]

From: Chad Campbell (chad.d.campbell@mail.sprint.com)
Date: Tue Nov 14 2000 - 13:04:07 CST

Darren says it best - so here's my summary:

Because you're using 2.5.1 or earlier and

10.224.128 isn't a "network" is a "network"

Class A networks have 1 octet specified and the first bit is "0".
Class B networks have 2 octets specified and the first bits are "10".
Class C networks have 3 octets specified and the first bits are "110".

Since starts with a "0" in binary, it's a class A network
to 2.5.1 or earlier. The *entire* network can be assigned a subnet
mask, but no smaller portion of it can have a different one.

Solaris 2.6 and greater have CIDR rules in the routing code and all
those limitations are removed.

thanks to:

Darren Dunham
Charles Gagnon

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