nanog mailing list archives
RE: MAP-T (was: Re: V6 still not supported)
From: Vasilenko Eduard via NANOG <nanog () nanog org>
Date: Fri, 25 Mar 2022 14:59:27 +0000
Hi Jared, Theoretically, MAP is better. But 1. Nobody has implemented it for the router. The code for the CGNAT engine gives the same cost/performance. No promised advantage from potentially stateless protocol. 2.MAP needs much bigger address space (not everybody has) because: a) powered-off subscribers consume their blocks anyway b) it is not possible to add "on the fly" additional 64 ports to the particular subscriber that abuse some Apple application (and go to 1k ports consumption) that may drive far above any reasonable limit of ports per subs. Design should block a big enough number of UDP/TCP ports for every subs (even most silent/conservative). Ed/ -----Original Message----- From: NANOG [mailto:nanog-bounces+vasilenko.eduard=huawei.com () nanog org] On Behalf Of Jared Brown Sent: Friday, March 25, 2022 4:49 PM To: nanog () nanog org Subject: MAP-T (was: Re: V6 still not supported) Most IPv6 transition mechanisms involve some form of (CG)NAT. After watching a NANOG presentation on MAP-T, I have a question regarding this. Why isn't MAP-T more prevalent, given that it is (almost) stateless on the provider side? Is it CPE support, the headache of moving state to the CPE, vendor support, or something else? NANOG 2017 Mapping of Address and Port using Translation MAP T: Deployment at Charter Communications https://www.youtube.com/watch?v=ZmfYHCpfr_w - Jared
Current thread:
- MAP-T (was: Re: V6 still not supported) Jared Brown (Mar 25)
- RE: MAP-T (was: Re: V6 still not supported) Vasilenko Eduard via NANOG (Mar 25)
- Re: MAP-T (was: Re: V6 still not supported) JORDI PALET MARTINEZ via NANOG (Mar 25)
- v6ops-transition-comparison (was: Re: MAP-T (was: Re: V6 still not supported)) John Curran (Mar 26)
- Re: MAP-T (was: Re: V6 still not supported) John Levine (Mar 26)
- Re: MAP-T (was: Re: V6 still not supported) JORDI PALET MARTINEZ via NANOG (Mar 26)
- Re: MAP-T Bjørn Mork (Mar 27)
- Re: MAP-T Nick Hilliard (Mar 27)
- Re: MAP-T (was: Re: V6 still not supported) JORDI PALET MARTINEZ via NANOG (Mar 25)
- RE: MAP-T (was: Re: V6 still not supported) Vasilenko Eduard via NANOG (Mar 25)
- RE: MAP-T (was: Re: V6 still not supported) Vasilenko Eduard via NANOG (Mar 25)
- Re: MAP-T (was: Re: V6 still not supported) Ben Plimpton (Mar 31)