Re: [addr-select-dt] Proposed default policy table
Mohacsi Janos <mohacsi@niif.hu> Mon, 12 July 2010 07:01 UTC
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Date: Mon, 12 Jul 2010 09:01:45 +0200
From: Mohacsi Janos <mohacsi@niif.hu>
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To: Tim Chown <tjc@ecs.soton.ac.uk>
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Cc: addr-select-dt@ietf.org
Subject: Re: [addr-select-dt] Proposed default policy table
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On Sun, 11 Jul 2010, Tim Chown wrote: > Tony, > > Now that 6rd is done, what's the view on 6to4? > > I know a lot of people would be quite keen to see 6to4 deprecated. I think 6to4 and teredo should be treated similarly - after ipv4. They should be used as a last resort acess to IPv6 resources. I think 6to4 should be kept since 6to4 is the most implemented IPv6 of the CPE equipments. Best Regards, Janos Mohacsi > > Tim > > On 8 Jul 2010, at 18:08, Tony Hain wrote: > >> For updating 3484-revise section 2.2, the table I have been running at home >> for some time is: >> >> Precedence Label Prefix >> ---------- ----- -------------------------------- >> 90 0 ::1/128 >> 75 1 fc00::/8 >> 70 1 fd00::/8 >> 50 2 2001::/16 >> 50 2 2400::/8 >> 50 2 2600::/8 >> 50 2 2a00::/8 >> 50 2 2c00::/8 >> 40 3 2002::/16 >> 30 3 2001::/32 >> 20 4 ::/0 >> 10 5 ::ffff:0:0/96 >> 5 6 ::/96 >> 4 6 fec0::/16 >> >> The explicit label 2 set is due to a bug in the vista stack, as that should >> be a single entry of 2000::/3, (and the fec0 should be /10). The differences >> from the proposed one in the October text are: >> - Adding explicit entries for each half of the ULA space to prefer local >> when possible (rule 2). >> - Explicitly listing 2000::/3 to avoid default resulting in the ambiguous >> choice of ula as src. >> - Keeping teredo and 6to4 as tunnels labeled the same. >> - Tunnels before default to avoid the ambiguous choices default will result >> in. >> - packaging all deprecated prefixes in the same label. >> >> The currently proposed table in 2.2 does not solve the problem in 1.1, so it >> would be good to move that example to an appendix or at least after the 2.2 >> discussion, and replace it with the one of a host selecting between Internet >> access and a closed network. >> >> I understand the desire to move teredo to less than IPv4. While I disagree >> with the premise, a resulting policy table that does that might look like: >> >> Precedence Label Prefix >> ---------- ----- -------------------------------- >> 90 0 ::1/128 >> 75 1 fc00::/8 >> 70 1 fd00::/8 >> 60 2 2000::/3 >> 50 3 ::/0 >> 30 4 2002::/16 >> 20 5 ::ffff:0:0/96 >> 5 4 2001::/32 >> 1 6 ::/96 >> 1 6 fec0::/16 >> >> I suggest leaving 10, 40, & 80 in the precedence so people can move IPv4 or >> ULA around without feeling the need to rewrite the other labels (they don't >> have to, but an obvious hole to park it in reduces confusion). I haven't >> tried that, and don't have time before I leave today, but I will put that in >> and see how it works before the IETF meeting. It should be close to what the >> current text was trying to get to, but with the explicit ula and gua >> prefixes to avoid default it should work more consistently. >> >> Tony >> >> >> >> >> _______________________________________________ >> addr-select-dt mailing list >> addr-select-dt@ietf.org >> https://www.ietf.org/mailman/listinfo/addr-select-dt > > _______________________________________________ > addr-select-dt mailing list > addr-select-dt@ietf.org > https://www.ietf.org/mailman/listinfo/addr-select-dt >
- Re: [addr-select-dt] Proposed default policy table Arifumi Matsumoto
- [addr-select-dt] Proposed default policy table Tony Hain
- Re: [addr-select-dt] Proposed default policy table Tim Chown
- [addr-select-dt] Update: draft-ietf-6man-addr-sel… Tim Chown
- Re: [addr-select-dt] Proposed default policy table Aleksi Suhonen
- Re: [addr-select-dt] Proposed default policy table Mohacsi Janos
- Re: [addr-select-dt] Proposed default policy table Tim Chown
- Re: [addr-select-dt] Proposed default policy table Arifumi Matsumoto
- Re: [addr-select-dt] Proposed default policy table Aleksi Suhonen
- Re: [addr-select-dt] Proposed default policy table Mohacsi Janos
- Re: [addr-select-dt] Proposed default policy table Arifumi Matsumoto
- Re: [addr-select-dt] Proposed default policy table Arifumi Matsumoto
- Re: [addr-select-dt] Update: draft-ietf-6man-addr… Arifumi Matsumoto
- Re: [addr-select-dt] Proposed default policy table Tim Chown
- Re: [addr-select-dt] Update: draft-ietf-6man-addr… Tim Chown
- Re: [addr-select-dt] Proposed default policy table Tony Hain
- Re: [addr-select-dt] Proposed default policy table Tony Hain
- Re: [addr-select-dt] Proposed default policy table Aleksi Suhonen
- Re: [addr-select-dt] Proposed default policy table Tim Chown