On Tue, 29 May 2007, Donald Stahl wrote:
That said- ARIN is handing out /48's- should we be blocking validly assigned networks?
your network might have to to protect it's valuable routing slots. There are places in the v4 world where /24's are not carried either. So, as Bill said just cause you get an allocation doesn't mean you can assure routability of it everywhere. I understand the problems but I think there are clear cut cases where /48's make sense- a large scale anycast DNS provider would seem to be a good candidate for a /48 and I would hope it would get routed. Then again that might be the only sensible reason...
f-root does this on the IPv6 side: 2001:500::/48 Whether that's available everywhere on IPv6 networks, is as Bill pointed-out, another question. wfms