Re: 6MAN Working group last call: draft-ietf-6man-rdnss-rfc6106bis

Fernando and Lorenzo,

I took a look at the draft of
https://www.ietf.org/id/draft-ietf-v6ops-dhcpv6-slaac-problem-06.txt.

>From Case 4 (all RA flags are set, that is, M=1, A=1, O=1) in A.2.2,
Fedora 21 and Centos 7 let the DNS of the RAs have higher priority, but
MAC OS-X lets the DNS of DHCPv6 have higher priority.
In the current implementations, there is no consistency to handle RDNSS
options from RA and DHCPv6.

Thus, I suggest the following text with the preference for DHCPv6 because
there is no a stong rationale, but there must be somehow a guidance to
handle this case:

The DNS options from Router Advertisements and DHCP SHOULD be
stored into the DNS Repository and Resolver Repository so that
information from DHCP appears there first and therefore takes
precedence. This document recommends that the DNS information
from DHCP should have higher priority than that of RA for
DNS queries to handle the case of the coexistence of RA and DHCP.

If anyone does not object this text, I will revise the draft with it.

Thanks.

Paul

On Fri, Mar 18, 2016 at 1:42 AM, Fernando Gont <fgont@si6networks.com>
wrote:

> On 03/17/2016 10:21 AM, Lorenzo Colitti wrote:
> > On Thu, Mar 17, 2016 at 10:12 PM, Fernando Gont <fgont@si6networks.com
> > <mailto:fgont@si6networks.com>> wrote:
> >
> >     > I'm not even sure "IPv6 hosts usually prefer DHCP to RA for their
> >     > network configuration" is a true statement. Do we have data on
> that?
> >
> >     The v6ops draft that you don't like covers this one.
> >
> >
> > ... and the answer is....?
>
> Section A.2.2. (and probably others) of:
> https://www.ietf.org/id/draft-ietf-v6ops-dhcpv6-slaac-problem-06.txt
>
> --
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
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-- 
===========================
Mr. Jaehoon (Paul) Jeong, Ph.D.
Assistant Professor
Department of Software
Sungkyunkwan University
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Email: jaehoon.paul@gmail.com, pauljeong@skku.edu
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