Re: Proposal to further clarify prefix length issues in I-D.ietf-6man-rfc4291bis
Mark Smith <markzzzsmith@gmail.com> Sat, 11 March 2017 12:10 UTC
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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sat, 11 Mar 2017 23:10:23 +1100
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Subject: Re: Proposal to further clarify prefix length issues in I-D.ietf-6man-rfc4291bis
To: Philip Homburg <pch-ipv6-ietf-3@u-1.phicoh.com>
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On 11 March 2017 at 22:49, Philip Homburg <pch-ipv6-ietf-3@u-1.phicoh.com> wrote: >> 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. See slide 18 onwards. https://www.slideshare.net/MarkSmith214/ipv6-ras-mostly-necessary > > 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. > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > --------------------------------------------------------------------
- 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