nanog mailing list archives
Re: IPv6 "bloat"
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Tue, 22 Mar 2022 23:04:09 +0900
Owen DeLong wrote:
IPv6 optional header chain, even after it was widely recognized that IPv4 options are useless/harmful and were deprecated is an example of IPv6 bloat.Extensive use of link multicast for nothing is another example of IPv6 bloat. Note that IPv4 works without any multicast.Yes, but IPv6 works without any broadcast. At the time IPv6 was being developed, broadcasts were rather inconvenient and it was believed that ethernet switches (which were just beginning to be a thing then) would facilitate more efficient capabilities by making extensive use of link multicast instead of broadcast.
No, the history around it is that there was some presentation in IPng WG by ATM people stating that ATM, or NBMA (Non-Broadcast Multiple Access)in general, is multicast capable though not broadcast capable, which was blindly believed by most, if not all excluding *me*, people there. It should be noted that IPv6 was less bloat because ND abandoned its initial goal to support IP over NBMA. > Turns > out multicast was arguably a wrong guess, but all indications > available at the time were that it was a good bet. See above. > There is still a valid argument to be made that in a switched > ethernet world, multicast could offer efficiencies if networks were > better tuned to accommodate it vs. broadcast. That is against the CATENET model that each datalink only contain small number of hosts where broadcast is not a problem at all. Though, in CERN, single Ethernet with thousands of hosts was operated, of course poorly, it was abandoned to be inoperational a lot before IPv6, which is partly why IPv6 is inoperational. Masataka Ohta
Current thread:
- Re: IPv6 "bloat", (continued)
- Re: IPv6 "bloat" Enno Rey (Mar 20)
- Re: IPv6 "bloat" Tom Beecher (Mar 19)
- Re: IPv6 "bloat" Michael Thomas (Mar 19)
- Re: IPv6 "bloat" Matt Hoppes (Mar 19)
- Re: IPv6 "bloat" Owen DeLong via NANOG (Mar 19)
- Re: IPv6 "bloat" Lady Benjamin Cannon of Glencoe (Mar 20)
- Re: IPv6 "bloat" Owen DeLong via NANOG (Mar 20)
- Re: IPv6 "bloat" Crist Clark (Mar 20)
- Re: IPv6 "bloat" Owen DeLong via NANOG (Mar 21)
- Re: IPv6 "bloat" Masataka Ohta (Mar 22)
- Re: IPv6 "bloat" history William Allen Simpson (Mar 22)
- Re: IPv6 "bloat" history Masataka Ohta (Mar 22)
- Re: IPv6 "bloat" history William Allen Simpson (Mar 25)
- Re: IPv6 "bloat" history William Allen Simpson (Mar 25)
- Re: IPv6 "bloat" history Masataka Ohta (Mar 28)
- Re: IPv6 "bloat" history Pascal Thubert (pthubert) via NANOG (Mar 28)
- Re: IPv6 "bloat" history Masataka Ohta (Mar 29)
- RE: IPv6 "bloat" history Pascal Thubert (pthubert) via NANOG (Mar 29)
- Re: IPv6 "bloat" history William Allen Simpson (Mar 31)
- Re: IPv6 "bloat" history William Allen Simpson (Mar 31)