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Re: [Dots] Éric Vyncke's Discuss on draft-ietf-dots-server-discovery-14: (with DISCUSS and COMMENT)

"Eric Vyncke (evyncke)" <evyncke@cisco.com> Wed, 04 November 2020 15:11 UTC

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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, The IESG <iesg@ietf.org>
CC: Valery Smyslov <valery@smyslov.net>, "Bernie Volz (volz)" <volz@cisco.com>, "zhencao.ietf@gmail.com" <zhencao.ietf@gmail.com>, "dots@ietf.org" <dots@ietf.org>, "tim@qacafe.com" <tim@qacafe.com>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "draft-ietf-dots-server-discovery@ietf.org" <draft-ietf-dots-server-discovery@ietf.org>
Thread-Topic: Éric Vyncke's Discuss on draft-ietf-dots-server-discovery-14: (with DISCUSS and COMMENT)
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Date: Wed, 04 Nov 2020 15:11:12 +0000
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Subject: Re: [Dots] Éric Vyncke's Discuss on draft-ietf-dots-server-discovery-14: (with DISCUSS and COMMENT)
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Med,

I guess we are converging about the remaining point, look for EV2>

-----Original Message-----
From: iesg <iesg-bounces@ietf.org> on behalf of "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
Date: Wednesday, 4 November 2020 at 12:48
To: Eric Vyncke <evyncke@cisco.com>, The IESG <iesg@ietf.org>
    >     > -- Section 5.1.2 --
    >     > I fully second Zhen Cao's review: how will the IPv4-mapped
    > IPv6
    >     > address(es) be used? They MUST not appear on the wire and
    > there is a
    >     > DHCPv4 option to convey the DOTS information. Is it when
    > DHCPv6 is
    >     > available, no DHCPv4, and only IPv4 connectivity to the DOTS
    > server
    >     > ? If so, then please clarify the text.
    >     >
    > 
    >     [Med] You got it. Added: " This is particularly useful in IPv4
    > service continuity deployments where only DHCPv6 is used."
    > 
    > EV> I am afraid that more text and explanations are required to
    > clear my remaining DISCUSS even if your suggested modification is a
    > big step forward
    > 

    [Med] We can add some pointers rather than expanding the text. What about:  

    "This is particularly useful in IPv4 service continuity deployments (e.g., [RFC6333]) where only DHCPv6 is used and DHCPv4-over-DHCPv6 [RFC7341] is not supported." 

EV2> What about

OLD TEXT
      Note, IPv4-mapped IPv6 addresses (Section 2.5.5.2 of [RFC4291])
      are allowed to be included in this option.

NEW TEXT
      Note, IPv4-mapped IPv6 addresses (Section 2.5.5.2 of [RFC4291])
      MAY to be included in this option when there is no DHCPv4 server able to advertise the DHCPv4 DOTS options and when only IPv4 connectivity is possible to the DOTS server. IPv4-mapped IPv6 addresses MUST NOT be used when there are DHCPv4 servers able to advertise the DHCPv4 DOTS options.

END OF NEW TEXT (the "MUST NOT" may be removed at your convenience)

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