Thus spake "John Kristoff" <jtk@depaul.edu> > This seems OK to me and appears to put the burden in the right place. > Shouldn't it be the responsibility of those who are allocated address > space to properly manage it? Others can still filter on long and valid > prefixes that they expect to hear. Or, if these non-routed allocations were from a specific IANA-designated block, providers could simply filter them all with one directive. > ...and if its gonna leak anyway, it might as well be globally unique. > Other networks will certainly be less likely to collide and try to > communicate with the leaked space. Certainly. However, providers tend to advertise whatever customers pay them to advertise, so these "non routable" blocks may end up permanently reachable from non-trivial portions of the Internet. There are many applications, such as pre-positioned content caching, where it's desirable to only have connectivity to those topologically "close". Overall, though, this makes it even more important that we find a workable solution to the multiple-address problem. S Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws the K5SSS dice at every possible opportunity." --Stephen Hawking