Re: subnet calculations

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Dennis Ferguson <dennis.c.ferguson%gmail.com@localhost> wrote:

> I'm assuming that "CIDR mask" means an address prefix length.  When
> doing this in a route lookup you can generally get a good result by
> dealing with prefix lengths and using clz()

What does it do? There is no man page for it.

> IP route tables which include multicast routes (and I think it is best
> done if unicast and multicast routes are all stored in the same table,
> rather than treating multicast as a bag-on-the-side wart) can have route
> prefixes as long as /64 for IPv4 and /256 for IPv6

Um, I feel rather ignorant: what does a CIDR greater than the address
length means?

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost