In a message written on Wed, Nov 30, 2011 at 07:19:51PM -0500, Ray Soucy wrote:
There is a lot of talk about "buggy" systems that are unable to handle prefixes longer than 64; but I've yet to encounter one. I imagine if
This has been one of the first thing I tested with new router gear for, well, a decade or more now of IPv6 testing. I too have never encountered such a box, even in the early days of IPv6. I think if any such boxes were made they were likely prototypes and never sold in quantity. There was a different, but related problem early on. Platforms with 32-bit TCAM that had to be retrofitted for IPv6 had to do multiple lookups. Two lookups got you 64 bits, and since 64 bits was the "longest subnet" they did dumb things past that bit boundary. This could result in less than line rate performance of IPv6 frames. I'm honestly having trouble remembering which platforms had this issue, perhaps someone remembers better than I do. However, I do think my lack of memory is in part because I haven't encountered one in a network anytime recently... In short, a total non-issue in terms of IPv6 deployment today. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/