Re: Generic anycast addresses...
Mark Smith <markzzzsmith@gmail.com> Sun, 02 June 2019 23:43 UTC
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References: <1DD451A7-D898-4105-974C-53776A3DA9F2@fugue.com> <20190530152902.l2nmyhadr4e4kt7x@faui48f.informatik.uni-erlangen.de> <0FF19D6D-1A45-41EF-BE34-CC35B5E51E1E@steffann.nl> <D91629F6-73AC-4A80-80EF-16644F73DA36@fugue.com> <701687d4-842c-6a16-3c97-349125324e3f@gmail.com> <D648647D-60E1-4DCE-B0BE-11002E0AE5A4@fugue.com> <25631.1559317738@localhost> <CAO42Z2x9iTrbvZuCxqSpDX-CQ9MtY8V1yyb-hg+XYtXXYn7LKg@mail.gmail.com> <9021.1559397908@localhost> <CAO42Z2xDUYOZqQ2_gjApifaPO3uG-kzjHpzND3nBD=hzw1TW2A@mail.gmail.com> <20190602130300.ebqbmvhb47r7pdog@faui48f.informatik.uni-erlangen.de>
In-Reply-To: <20190602130300.ebqbmvhb47r7pdog@faui48f.informatik.uni-erlangen.de>
From: Mark Smith <markzzzsmith@gmail.com>
Date: Mon, 03 Jun 2019 09:42:48 +1000
Message-ID: <CAO42Z2z9JkczxvYb09d4Fp7O17nnd0RHjPGnTaG26RPxPVa+Xw@mail.gmail.com>
Subject: Re: Generic anycast addresses...
To: Toerless Eckert <tte@cs.fau.de>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, 6MAN <6man@ietf.org>
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On Sun., 2 Jun. 2019, 23:03 Toerless Eckert, <tte@cs.fau.de> wrote: > As you are repeating your argument to make your case, What am I supposed to do when people ask about things already covered in my draft? Here's the link again. https://tools.ietf.org/html/draft-smith-6man-form-func-anycast-addresses-00 let me > respectfully also disagree again, but also suggest what IMHO would be > a safer and more flexible approach. > > IMHO, it would be lovely to primarily think of standardizing whats > IMHO been most missing piece for more proliferation of anycast, and > thats an appropriate prototol for anycast members to signal their > membership. > >From my draft, Hmm, there really needs to be any "Anycast Listener Discovery" protocol similar or same as MLD.). That would get a us a lot further proliferating benefits of anycast. > If defined appropriately rich to indicate scope/zone for example, IMHO we > would > solve the scope problem as well without having to creating more and > more specialized address spaces. > > There are also other policies for redundant IP addresses > than anycast (nearest member). For example, what i called > "prioritycast", where you want the current highest-priority member of > the group to be the destination. And in a time where delay becomes for > many applications as important if not more so than throughput, "nearest" > could have different bandwidth vs. delay interpretations and routing > policies. > > I can see how there will be an ongoing demand to support lazy, oops: > easy "discovery" options with well-known addresses, but lets not assume > that we should or could come up with a generally applicable better working > address encoded scoping solutions than we did in the past or assume that > one specific form of redundany (IGP SPF "shortest") is the only necessary > policy. > > Aka: I think for each application that needs one or a limited number > of well-known addresses an IANA allocation could be given from a TBD > larger block of well-known "functional unicast addresses" for which > the default policy is not to route, and the policy for each allocation > is to define (via an RFC) how to route/forward it. Effectively this would > mean this block must not be forwarded via aggregated routes, because the > route policy of each allocation should support to be differernt: notion > of scope/zones/anycast/priority/.... > > This would allow Ted to come up with a routing policy for the > adress(es) he wants to have and his definition of what an appropriate > "scope/zone" is, without us (IETF) having to agree that that is a > universally > reusable notion of scope/zone. > > The only downside for an app like the one from Ted would be that he > wouldn't get on riding on the default route for free but that whoever > wants to use the address has to explicitly add the right routes and routing > policy. Of course this may only be true in the future depending of which > address space we carve out this address space from - if its carved out > of existing global address space it would be routed via default-route by > legacy equipment. > > Cheers > Toerless > > On Sun, Jun 02, 2019 at 10:35:00AM +1000, Mark Smith wrote: > > I think we need a formal, multi-scoped anycast address space. > > > > Anycast also has enough properties in common with multicast that I think > it > > should be more than just a configured special case address within the > > unicast address space. I think it should be a distinct class in between > > unicast and multicast. > > > > Unicast: 1:1 > > Anycast: 1:Any > > Multicast: 1:Many > > > > > > IPv6 Formal Anycast Addresses and Functional Anycast Addresses > > > > > https://tools.ietf.org/id/draft-smith-6man-form-func-anycast-addresses-00.txt > > > > > > Regards, > > Mark. >
- Generic anycast addresses... Ted Lemon
- RE: Generic anycast addresses... Dave Thaler
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... George Michaelson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Bob Hinden
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... George Michaelson
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... George Michaelson
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... JORDI PALET MARTINEZ
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Sander Steffann
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Sander Steffann
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Fred Baker
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... STARK, BARBARA H
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Brian E Carpenter
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Sander Steffann
- Re: Generic anycast addresses... George Michaelson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Brian E Carpenter
- Re: Generic anycast addresses... Brian E Carpenter
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Fred Baker
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mikael Abrahamsson
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Mikael Abrahamsson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... joel jaeggli
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Fred Baker
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Nick Hilliard
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Joel Jaeggli
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Ole Troan
- Re: Generic anycast addresses... Brian E Carpenter
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Sander Steffann
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Nick Hilliard
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... joel jaeggli
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Mikael Abrahamsson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Mikael Abrahamsson
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Christian Huitema
- Re: Generic anycast addresses... Toerless Eckert
- Re: Generic anycast addresses... Michael Richardson
- Re: Generic anycast addresses... Brian E Carpenter
- Re: Generic anycast addresses... Mikael Abrahamsson
- Re: Generic anycast addresses... Sander Steffann
- Re: Generic anycast addresses... Christian Huitema
- Anycast to unicast resolution (was: Re: Generic a… Toerless Eckert
- Re: Anycast to unicast resolution (was: Re: Gener… Christian Huitema
- Re: Anycast to unicast resolution (was: Re: Gener… Brian Haberman
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Alexandre Petrescu
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Bob Hinden
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Bob Hinden
- Re: Generic anycast addresses... Ted Lemon
- Re: Generic anycast addresses... Mark Smith
- Re: Generic anycast addresses... Erik Kline
- Re: Generic anycast addresses... Mark Smith