Stupid Question maybe?

Saku Ytti saku at ytti.fi
Tue Dec 18 20:11:46 UTC 2018


On Tue, 18 Dec 2018 at 21:52, Brian Kantor <Brian at ampr.org> wrote:

> of the address word was efficient, since subnet masks were always
> a series of ones followd by zeros with no interspersing, which
> was incorporated (or independently invented) about a decade later

>From protocol POV there is no reason to make this assumption. It just
seems to make more sense for humans and modern hardware make the
assumption for forwarding, like it does make assumptions for the
distribution of prefix sizes, anything to get more out of less. For
ACL that assumption is still not true. It's optimisation which loses
information which for the common case does not matter.

-- 
  ++ytti



More information about the NANOG mailing list