Re: Proposal to further clarify prefix length issues in I-D.ietf-6man-rfc4291bis
Philip Homburg <pch-ipv6-ietf-3@u-1.phicoh.com> Sat, 11 March 2017 11:49 UTC
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To: ipv6@ietf.org
Subject: Re: Proposal to further clarify prefix length issues in I-D.ietf-6man-rfc4291bis
From: Philip Homburg <pch-ipv6-ietf-3@u-1.phicoh.com>
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In-reply-to: Your message of "Sat, 11 Mar 2017 09:57:07 +0100 ." <DB582F48-22FD-4240-9B78-ECF60FCA68D2@employees.org>
Date: Sat, 11 Mar 2017 12:49:23 +0100
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> Is there anything here that isn't covered by 5942? > > And creating an artificial separation of prefixes used for address > assignment (SLAAC) and prefixes used for on-link determination > seems fraught with dangers. E.g. from a router perspective you need > a connected route aka an onlink prefix for the prefix used for > address assignment, otherwise you have no reachability. It seems to me that RFC 5942 doesn't say a lot about stateless address configuration. So if we want to say something like 'the IID used for SLAAC should be 64 bits' then RFC 5942 is not of help. The classical example where a prefix is not onlink is NBMA networks. But I can imagine that once IPv4 is out of the way, people will find more creative uses where it helps if a prefix that is used for SLAAC is not onlink. Note that in the context of ND, onlink prefixes is mostly about host behavior, because routers are (in practice) not using them to configure what is onlink or not. Also note that hosts may consider a prefix not onlink whereas the router considers the prefix onlink. ND can handle that.
- Proposal to further clarify prefix length issues … james woodyatt
- Re: Proposal to further clarify prefix length iss… Philip Homburg
- Re: Proposal to further clarify prefix length iss… Alexandre Petrescu
- Re: Proposal to further clarify prefix length iss… David Farmer
- Re: Proposal to further clarify prefix length iss… james woodyatt
- Re: Proposal to further clarify prefix length iss… james woodyatt
- Re: Proposal to further clarify prefix length iss… Philip Homburg
- Re: Proposal to further clarify prefix length iss… Brian E Carpenter
- RE: Proposal to further clarify prefix length iss… Manfredi, Albert E
- Re: Proposal to further clarify prefix length iss… james woodyatt
- Re: Proposal to further clarify prefix length iss… james woodyatt
- Re: Proposal to further clarify prefix length iss… Fred Baker
- Re: Proposal to further clarify prefix length iss… sthaug
- Re: Proposal to further clarify prefix length iss… 神明達哉
- Re: Proposal to further clarify prefix length iss… Suresh Krishnan
- Re: Proposal to further clarify prefix length iss… otroan
- Re: Proposal to further clarify prefix length iss… Philip Homburg
- Re: Proposal to further clarify prefix length iss… Mark Smith
- Re: Proposal to further clarify prefix length iss… Philip Homburg
- Re: Proposal to further clarify prefix length iss… Mark Smith
- Re: Proposal to further clarify prefix length iss… Alexandre Petrescu
- Re: Proposal to further clarify prefix length iss… Alexandre Petrescu