The difference is that 464XLAT/NAT64 is the only one that runs in cellular networks.
Also with 464XLAT, you don't need DNS64. This document is already in the RFC Editor Queue: https://datatracker.ietf.org/doc/draft-ietf-v6ops-nat64-deployment/ El 6/8/19 1:24, "NANOG en nombre de Mark Andrews" <nanog-boun...@nanog.org en nombre de ma...@isc.org> escribió: > On 6 Aug 2019, at 9:05 am, Mark Tinka <mark.ti...@seacom.mu> wrote: > > > > On 2/Aug/19 14:17, Baldur Norddahl wrote: > >> >> >> The pricing on IPv4 is now at USD 20/address so I am thinking we are >> forced to go the CGN route going forward. Of all the options, MAP-E >> appears to be the most elegant. Just add/remove some more headers on a >> packet and route it as normal. No need to invest in anything as our >> core routers can already do that. No worries about scale. > > Actually, I think NAT64/DNS64/464XLAT is the best option, because as > more IPv4 falls away, you are automatically translating less and going > native IPv6 more. And there is nothing for you to "turn off" or migrate > away from after all is said & done. > > Mark. Which only applies to DNS64 and not 464XLAT. That said, every IPv6 node should be attempting to connect over IPv6 first. That alone moves most of the traffic to IPv6 regardless of the IPv4aaS method in use. DNS64 also breaks DNSSEC which is not a good thing. DNS64 alone also depends on *everybody* having good (complete) IPv6 connectivity and not leaving IPv6 breakages uncorrected. There is no fallback to IPv4 with DNS64 alone. If you also have 464XLAT with DNS64 then there is NO DIFFERENCE to MAP-[ET] or DS-Lite in terms of traffic shifting to native IPv6. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ********************************************** IPv4 is over Are you ready for the new Internet ? http://www.theipv6company.com The IPv6 Company This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.
