Randy Bush wrote:
/126 - Router p2p/127, see MATSUZAKI Yoshinobu gave a talk describing the ping pong attack on /127 at a ripe or apricot or both. both web sites are absolutely horrid at letting one find talks (see nanog for an example of good). randy
Here's a link to the talk -- http://archive.apnic.net/meetings/26/program/apops/matsuzaki-ipv6-p2p.pdf -Larry

