On Fri, Nov 19, 2010 at 4:09 PM, Joel Jaeggli <joe...@bogus.com> wrote: > On 11/19/10 12:45 PM, William Herrin wrote: >> The meaningful boundaries in the protocol itself are nibble and /64. >> If you want socially significant boundaries, add /12, /32 and /48. > > It is possible and desirable to be able to describe any mask length > between /0 and /128. the /64 is an important demarcation point for > subnets but everything shorter than that will appear in your routing table.
Hi Joel, Bit, nibble and /64 then. /64 is treated specially by functions in the protocol (like SLAAC) thus it's a protocol boundary rather than a social one (/12 IANA allocations, /32 ISP allocations, /48 end-user assignments). Unless you particularly feel the need to assign /64's to router loopbacks, you'll see plenty of routes longer than /64 in your table too. Regards, Bill Herrin -- William D. Herrin ................ her...@dirtside.com b...@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
