On 15/08/2009, at 4:34 PM, Randy Bush wrote:
I'm going to contradict you there. Classful addressing had a lot to
recommend it. The basic problem we ran in to was that there weren't
enough B's for everyone who needed more than a C and there weren't
enough A's period. So we started handing out groups of disaggregate
C's and that path led to the swamp.
the swamp preceeded cidr
and, if you had a bit of simple arithmetic clue, you would realize
that,
unless you are prescient, you will always run out of some classes
before
others. as we are very poor at predicting the future, there was no
win
to be had in classful.
This is really this basis of my reply, so, I'll just say +1
Read about how sparse allocation/binary chop stuff works. You get the
same amount of routes in your IGP table (or less) but it's much more
flexible.
--
Nathan Ward