Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-addressing-considerations-00.txt
Eduard Metz <etmetz@gmail.com> Tue, 05 January 2021 13:24 UTC
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From: Eduard Metz <etmetz@gmail.com>
Date: Tue, 05 Jan 2021 14:24:14 +0100
Message-ID: <CAG=3OHf5jSPgr-R8Ny=uHQi4exSEf7x-QVNDjePO59314NtoYg@mail.gmail.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: Gert Doering <gert@space.net>, Fernando Gont <fgont@si6networks.com>, IPv6 Operations <v6ops@ietf.org>, draft-gont-v6ops-ipv6-addressing-considerations@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/xFcBv35KAn8FuMOya3bwrbbFMH4>
Subject: Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-addressing-considerations-00.txt
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Maybe the last column should be "Applicable to Internet" (no / no / yes) or something along these lines. I assume the point here is to indicate that link-local and ULA cannot be used on the Internet. cheers, Eduard On Thu, Dec 31, 2020 at 8:48 PM Brian E Carpenter < brian.e.carpenter@gmail.com> wrote: > Gert, > > On 31-Dec-20 23:30, Gert Doering wrote: > > Hi, > > > > On Thu, Dec 31, 2020 at 02:00:33PM +1300, Brian E Carpenter wrote: > >> 4. The following table attempts to show some of the distinctions > >> involved (simplified). View in a fixed-width font. You may not > >> agree with it... > >> > >> Unicast Prefix IID Routeable Announced > >> address assigned assigned > >> types by by > >> ----------------------------------------------------------- > >> Link-local fixed host no no > >> by RFC > >> > >> ULA user/RA host or yes IGP only > >> (random) DHCPv6 > >> > >> GUA IANA/RIR/ host or yes IGP, > >> ISP/user/RA DHCPv6 BGP4 by policy > > > > Indeed, I am not agreeing - as there is nothing that prevents ULAs from > > being transported by BGP. > > Indeed, nothing in the laws of physics, but it's default-forbidden by > an RFC ;-). Exactly how to express that in a short table is tricky. > > I think we all agree about this; what Fernando's draft shows is that it > is quite hard to describe, and the word "global" is confusing. > (Really for the same reason that URLs were renamed from "universal" > to "uniform" in 1994. But renaming "global" at this stage seems almost > impossible.) > > Brian > > > > > We use ULAs for "services that must never reachable from the Internet", > > and our routing being what it is, everything is transported by BGP - only > > loopbacks in OSPF. The difference is "do we announce it to other ASes?" > > > > So maybe this should be "generally expected to be visible by other > > networks on the Internet" (ULA: no, GUA: yes). > > > > But that's neither precise nor does "expected" mandate anything - I might > > want to announce our ULA prefix to our sister company, using eBGP, and > > I might decide to not announce our GUA IPv6 PI /48 that we use for our > > backbone infra "because people are not supposed to send packets there"... > > > > Gert Doering > > -- NetMaster > > > > _______________________________________________ > v6ops mailing list > v6ops@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops >
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Fernando Gont
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Fernando Gont
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Gert Doering
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Brian E Carpenter
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Eduard Metz
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Gert Doering
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Fernando Gont
- Re: [v6ops] I-D Action: draft-gont-v6ops-ipv6-add… Eduard Metz