On Mon, Jul 17, 2017 at 6:40 PM, Paul McNary <[email protected]> wrote:
> I would prefer to give my residential users a /48 for the future but a /56 > Hi Paul, This is acceptable under current ARIN policy and would remain so under variant of the policy currently under discussion. > could work, just a pain. Again rDNS could be a problem. > > Do AS's use ARIN reverse DNS for size smaller than /48? > If rDNS will not work worldwide except with /48 advertising, > RDNS for IPv6 works best with allocations on nibble boundaries. /48, /52, /56, /60, /64, etc. It's only fractionally more work on non-nibble boundaries but not nearly as clean. Clean solutions are desirable. > I think that should be the SWIP boundary. > I know for a while some AS's required /32. > You may be confusing RDNS with BGP. For a while, a few Internet backbones refused to accept and route BGP prefixes longer than (less than) a /32. The last holdout gave up a couple years ago; standard practice is now /48. It's unlikely to change to anything longer than a /48, ever. IPv6 RDNS has always worked at any CIDR level and continues to work most cleanly at any nibble boundary. Regards, Bill Herrin -- William Herrin ................ [email protected] [email protected] Dirtside Systems ......... Web: <http://www.dirtside.com/>
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