[ppml] Technical reason why /52,/56,/60,/64 are bad

[Randy Bush]

Kevin Loch wrote:
> If there are 128 bits in the address field we need to be able to route
> all 128 bits (quickly).

we went through this with the ivtf some years back, and made very clear
that forwarding and routing on all 128 bits were mandatory.  there
should not be a problem in this space.

i am not aware that any of us who use 126/ for p2p links, and insert
them into is-is, use them as bgp next-hops, etc., have run into any
problems.

randy