Re: IPv6 Addressing Help

[Nathan Ward <nanog () daork net>]

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