Re: [v6ops] Discussion of draft-ietf-v6ops-ula-usage-recommendations
Mark Andrews <marka@isc.org> Tue, 21 July 2015 16:28 UTC
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To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
From: Mark Andrews <marka@isc.org>
References: <6153A91F-7E9A-4579-BA06-72964568D343@cisco.com> <55AE54D3.7070502@gmail.com> <55AE5D01.5090309@gmail.com> <55AE71F7.8000107@gmail.com>
In-reply-to: Your message of "Tue, 21 Jul 2015 18:23:19 +0200." <55AE71F7.8000107@gmail.com>
Date: Wed, 22 Jul 2015 02:28:35 +1000
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Archived-At: <http://mailarchive.ietf.org/arch/msg/v6ops/zdE9b40o4Z_liBpl0JespHXfHzM>
Cc: v6ops@ietf.org
Subject: Re: [v6ops] Discussion of draft-ietf-v6ops-ula-usage-recommendations
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In message <55AE71F7.8000107@gmail.com>, Alexandru Petrescu writes: > > > Le 21/07/2015 16:53, Brian E Carpenter a crit : > > On 22/07/2015 02:18, Alexandru Petrescu wrote: > >> 1. Brian suggested to recommend that globals should be there on > >> the machines having ULAs as well, if I understand correctly. > >> > >> But I think so only on some Hosts, mainly the Hosts of end users. > > > > All hosts that need external communication. > > I agree, all hosts that need external communication. > > > >> 2. the ULA RFC suggests a ULA prefix can be generated out of a MAC > >> address. That sixxs implementation does it. Except it takes it > >> too serious: it does not accept a MAC address which is not a real > >> MAC address - in that oui.txt. And random MAC addresses (for > >> privacy) certainly are not in that oui.txt. > >> > >> I think this is an undesirable situation to be in: unable to > >> generate ULAs because the only tool out there (sixxs) can't refuses > >> a copy paste a MAC address from the widely used windows 7 laptops. > > > > That isn't a standards issue, but I agree that operationally, there > > needs to be a viable way for anyone to generate a random number. Wait > > a minute, that doesn't seem hard. > > It's easily done centrally, but in a distributed manner it's harder - > how am I sure the network I connect to has ULAs generated such that they > dont clash with mine? *YOU* generate you ULA properly. > >> I am not sure what the problem is, but it's very good to have a > >> very easy way to generate ULAs. > >> > >> 3. in an enterprise deployment there was a problem of ULAs deployed > >> in a intra-network and another ULA space in another intra-network, > >> of the same enterprise. So we wanted to make sure two things: the > >> two ULA spaces are distinct, or otherwise make sure the gateway > >> router does not route between the two intranets' ULAs (but yes, > >> route between their respective GUAs). > > > > Why not? ULA to ULA routing on a private link might be desired (e.g. > > after two networks merge without renumbering). From a routing PoV > > there is nothing special about a ULA prefix; we just need to > > configure carefully where it is routed and where it is not routed. > > Yes, private routing should be ok, but only if these ULAs are unique. > If people on different networks use different generation methods then > it's dubious to be sure of the uniqueness. Maybe I choose fd00:1::/64 > being sure that no random generator will make it, and it happens my > neighbors does the same. That leads to conflict on fd00:1::/64 and we > dont want routing enabled between the two. Generate. Don't choose. If you generate then you should be ok. > > Anyway - I'd like to see the draft progress. Has it already had a > > WGLC? > > I agree, it already has advice in it worth progressing. > > Alex > > > > > Brian > > > >> I am not sure how to translate that into advice, because I am not > >> sure how it will unfold in the near future. > >> > >> Alex > >> > >> Le 21/07/2015 16:02, Fred Baker (fred) a crit : > >>> https://tools.ietf.org/html/draft-ietf-v6ops-ula-usage-recommendations > >>> > >>> > >> > >>> > "Considerations For Using Unique Local Addresses", Bing Liu, Sheng > >>> Jiang, 2015-05-03 > >>> > >>> This draft came up from the floor this afternoon. I think we > >>> need some concentrated constructive conversation regarding it - > >>> we have had a lot of the other kind. > >>> > >>> What issues do we need to address to complete it. and what > >>> specific recommendations would that include? > >>> > >>> > >>> > >>> _______________________________________________ v6ops mailing > >>> list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops > >>> > >> > >> _______________________________________________ v6ops mailing list > >> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops > >> > > > > > > _______________________________________________ > v6ops mailing list > v6ops@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
- [v6ops] Discussion of draft-ietf-v6ops-ula-usage-… Fred Baker (fred)
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Brian E Carpenter
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Mark Andrews
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Mark Andrews
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… joel jaeggli
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Brian E Carpenter
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Gert Doering
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Gert Doering
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Alexandru Petrescu
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Gert Doering
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Mark Smith
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Mark Smith
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… joel jaeggli
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Erik Kline
- Re: [v6ops] Discussion of draft-ietf-v6ops-ula-us… Liubing (Leo)