RE: IPv4 address length technical design

[Paul Vinciguerra <pvinci () VinciConsulting com>]

> Ok, then let's take a step back, perhaps not permanently, and say DNS 
> resolution is only really useful for routers with more than just a 
> single default external route.
>
> So DNS could be reduced to an inter-router only protocol, similar to 
> BGP in some sense.

LISP DDT uses a lookup to determine EID location.

We operate one of the DDT roots, and yes the difference is that LISP uses an on-demand pull mechanism, where the route 
is looked up and then cached until it ages out from inactivity.  BGP pushes every route to peers and everyone running 
BGP pays a hardware tax for carrying each and every route. (See Bill Herrin's work at 
http://bill.herrin.us/network/bgpcost.html)   DDT provides a scalable, distributed database similar to DNS for looking 
up prefixes in LISP mapping servers.