From martin.hunek@tul.cz Sun Nov 5 17:40:59 2023 Return-Path: X-Original-To: v6ops@ietfa.amsl.com Delivered-To: v6ops@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 03C5FC1C02AD for ; Sun, 5 Nov 2023 17:40:59 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.107 X-Spam-Level: X-Spam-Status: No, score=-2.107 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=tul.cz Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Sl4T5eRjVXFB for ; Sun, 5 Nov 2023 17:40:54 -0800 (PST) Received: from bubo.tul.cz (bubo.tul.cz [147.230.16.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3037BC151701 for ; Sun, 5 Nov 2023 17:40:52 -0800 (PST) X-Virus-Scanned: amavisd-new at tul.cz Received: from asclepius.adm.tul.cz (unknown [147.230.238.39]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bubo.tul.cz (Postfix) with ESMTPSA id 01B8D18050A06; Mon, 6 Nov 2023 02:40:46 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 bubo.tul.cz 01B8D18050A06 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tul.cz; s=tul2021; t=1699234847; bh=rpm+ALUKVE82babTkrlB6XD+vJW78maAZMOrIPvLKX0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dVBPnLdL3wJCdR8A4pPdI5bd2iQpi/aibniJKbDzj7Pz3SjiCWTgjycZY7sGU+x1B QCwlHPgSJRydzpgY7E1NRwPkczkzeN2DTA61s0KPOLRvqksttI9egQCufWA7QjgyUA I45wOB4rXUiHDacJ4bKk/OXN0imR2G2gnVk3hX/8fRZts8rgtJtsHHwVP7M7dd6xcZ Vp2zKuaIt4ec+fmJCUvWPyH8+60Ipbhy7SX4Q+RQypOsclswr9TBlg5/kHM8lRTWTa xM37vEqU3UARI5wc/zZtu2bxdUhrylrvLpTL0is+dOelLjV5zBm5gqxeCeVrn9TmWL RErhHgQdLugGg== From: Martin =?utf-8?B?SHVuxJtr?= To: Brian E Carpenter , Ole Troan , V6 Ops List Cc: Xiao Ma , Jen Linkova Date: Mon, 06 Nov 2023 02:40:41 +0100 Message-ID: <4598146.F5Vx1aKkY9@asclepius.adm.tul.cz> Organization: =?UTF-8?B?VGVjaG5pY2vDoQ==?= univerzita v Liberci In-Reply-To: References: <169919966581.36738.5162400304409089286@ietfa.amsl.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2947533.CK8QYMRfkY"; micalg="sha384"; protocol="application/pkcs7-signature" Archived-At: Subject: Re: [v6ops] New Version Notification for draft-ietf-v6ops-dhcp-pd-per-device-05.txt X-BeenThere: v6ops@ietf.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: v6ops discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Nov 2023 01:40:59 -0000 --nextPart2947533.CK8QYMRfkY Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Hi Jen, Dne ned=C4=9Ble 5. listopadu 2023 17:17:13 CET, Jen Linkova napsal(a): > Hello, >=20 > Following the conclusion of the WGLC (thanks to everyone who > commented!), we've submitted a -05 version with the following changes: > 1. Making it more clear that the draft requires the network to > delegate a SLAAC-suitable prefix, and /64 is currently required for > SLAAC to work - but it doesn't have to be like that in the future. > Examples also use /64. Brian, does it address your comment? Even in the hypothetical situation in which IETF agrees on making SLAAC wor= k on longer prefixes, you will still need to maintain compatibility with ol= der implementations that require /64. So the /64 is set to the stone. > 2. To address most of Ole's comments: > 2.1 Making it explicit that the draft only covers the network > behavior, while host requirements are out of scope. This seems to be an elegant way to solve the elephant-in-the-room problem. = Pretend that the elephant is out of scope. The Client/Host behaviour makes = a difference between address space hungry draft dangerous for a lot of addr= ess plans and the useful tool that can solve multiple entries in neighbour = cache for all networks (even for those with a single /64). The difference i= n question is in what the client puts in the prefix-length hint field (toge= ther with 2nd point of section 7 - an unnecessary requirement of implicit m= in. /64). > 2.2 Clarifying that the network can support both flat and > hierarchical models - it's up to the host to specify the hint. Undefined behaviour of the host ... > 3. Rewriting examples in the prefix length consideration section to > make it clearer that the proposal does not require an excessive amount > of IPv6 space. But it does! It is the same address-space-hungry draft as the initial colli= n-00 version. The formula used in the -05 version of the draft means: If yo= u have at least X+32 of IPv6, you can be in the same situation with IPv6 as= you are in IPv4. Now, do we want to be in the same situation? Why migrate = to IPv6, then? At least, I want to have some reasonable route aggregation and not look so = often if I'm running out of space every time. This cost some additional spa= ce. If I can choose between having a "nicer," more aggregated addressing pl= an or allowing every host to extend the network, what do you think I will c= hoose? I don't want to be in the same situation as I'm in IPv4. I agree with Gert. You can have /80s all you want, but you are not getting = /64s from me. If your implementation requires it, then it is NAT66 for you,= ND proxy, or IPv4 only. You choose. We are trying to solve the excessive amount of addresses used by some imple= mentations by the excessive prefix size given to them. Is it a smart soluti= on? Regard, Martin >=20 >=20 >=20 > On Sun, Nov 5, 2023 at 4:54=E2=80=AFPM wrote: > > > > A new version of Internet-Draft draft-ietf-v6ops-dhcp-pd-per-device-05.= txt has > > been successfully submitted by Jen Linkova and posted to the > > IETF repository. > > > > Name: draft-ietf-v6ops-dhcp-pd-per-device > > Revision: 05 > > Title: Using DHCPv6-PD to Allocate Unique IPv6 Prefix per Client in = Large Broadcast Networks > > Date: 2023-11-05 > > Group: v6ops > > Pages: 20 > > URL: https://www.ietf.org/archive/id/draft-ietf-v6ops-dhcp-pd-per-= device-05.txt > > Status: https://datatracker.ietf.org/doc/draft-ietf-v6ops-dhcp-pd-per= =2Ddevice/ > > HTML: https://www.ietf.org/archive/id/draft-ietf-v6ops-dhcp-pd-per-= device-05.html > > HTMLized: https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-dhcp-p= d-per-device > > Diff: https://author-tools.ietf.org/iddiff?url2=3Ddraft-ietf-v6ops-= dhcp-pd-per-device-05 > > > > Abstract: > > > > This document discusses an IPv6 deployment scenario when individual > > clients connected to large broadcast networks (such as enterprise > > networks or public Wi-Fi networks) are allocated unique prefixes via > > DHCPv6 Prefix Delegation (DHCPv6-PD). > > > > > > > > The IETF Secretariat > > > > >=20 >=20 >=20 --nextPart2947533.CK8QYMRfkY Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgIFADCABgkqhkiG9w0BBwEAAKCCEsIw ggWBMIIEaaADAgECAhA5ckQ6+SK3UdfTbBDdMTWVMA0GCSqGSIb3DQEBDAUAMHsxCzAJBgNVBAYT AkdCMRswGQYDVQQIDBJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAOBgNVBAcMB1NhbGZvcmQxGjAYBgNV BAoMEUNvbW9kbyBDQSBMaW1pdGVkMSEwHwYDVQQDDBhBQUEgQ2VydGlmaWNhdGUgU2VydmljZXMw HhcNMTkwMzEyMDAwMDAwWhcNMjgxMjMxMjM1OTU5WjCBiDELMAkGA1UEBhMCVVMxEzARBgNVBAgT Ck5ldyBKZXJzZXkxFDASBgNVBAcTC0plcnNleSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNU IE5ldHdvcmsxLjAsBgNVBAMTJVVTRVJUcnVzdCBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkw 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