IETF Logo Mail Archive

Re: [IPv6] Subject: Mandating SRH when using C-SIDs (draft-ietf-spring-srv6-srh-compression)

Francois Clad <fclad.ietf@gmail.com> Thu, 04 April 2024 18:47 UTC

Return-Path: <fclad.ietf@gmail.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 21FE4C14F60B; Thu, 4 Apr 2024 11:47:18 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.094
X-Spam-Level:
X-Spam-Status: No, score=-2.094 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, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, 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=gmail.com
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 ba1yxDcyIsww; Thu, 4 Apr 2024 11:47:14 -0700 (PDT)
Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 447E5C14F600; Thu, 4 Apr 2024 11:47:14 -0700 (PDT)
Received: by mail-ej1-x636.google.com with SMTP id a640c23a62f3a-a4a387ff7acso173441766b.2; Thu, 04 Apr 2024 11:47:14 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712256432; x=1712861232; darn=ietf.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=XQ69s0FVLnYaTXEWbPGGeM4UI7hQQ7jQ14CeNLmvFsY=; b=X3S4fMIb3eWyf0W94Vt8OAXwu3YI6xOqR9Tu26vskhdFvMSthFAb/AFY85C8WNi+Tl aCOaAymb3tVB+Gly3erj3mUcWpZUeUnTKHFWn6amqPHO0XHigOyIXjMByZat6QDLuQiW 8obl6PIb0fCFh+uiLnxZunonXQiqpenS+bQxUsT8MylJZNCy9c5aKjzidtno6CO/P7TT /nwU3ohF02Ui0NN0Capt1ZYLu02SCJBRj/DOiT0dLbNeUSEg3aWtNzl01dcnPzhhemTU VJ/a8xmS75vXTr4dggOiY5HQTU0bv28HupUkMTs1+TIxqU5MOPXef9NoOQSIKEFEliAH e0Kg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712256432; x=1712861232; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=XQ69s0FVLnYaTXEWbPGGeM4UI7hQQ7jQ14CeNLmvFsY=; b=Gjm6aB3r5F+JMDoblTivmsX5CI2IEIdqHWVBEz+rSp6QGOUbUmesOPuVlgSdci7Oam ivgmRotfkLlAjiYai1kba/R+kT6GACg18xQ+U5//fg8L/gD2xEF8MfWUDBYA3low+Arm fugJ6kVUIJ1Gs7x9eqIc77i6ivaYGFUAOhuwA7nNIrte3UxL0HhfAW3nYHjcYqvVBlwJ cqhPgrmp6CFTa5Tk5a4ddMrw4frwbTRtIhmubbO4WNJ2tuvdEtZ6ybVFTqzDXilVb5AW Bbol6dBYRSQWKWx64UHKStA/ROEUoU+jAisNFamRD7u36q8B8vCoZs0IZmeWHZmZCtKS 1tEQ==
X-Forwarded-Encrypted: i=1; AJvYcCWFnW9kB3k7n2hOKj2sgYOXiv8DdQyQbG2QmgK9otQQA/PksN+vQ+ffuGOFskztgEYzFbnmW/JuMxs0rztwbCDHBpWqAnP2UuoHBXdyRFqgcIoEhyNVErY=
X-Gm-Message-State: AOJu0Yw57ZUK0qu0/QWNkXhVzpaGM0Chtranlrlq/Uvf/VOvVDuo3L6m MQj0fmfvUs1gWTd4i6g0h9Y6XuFvHA1K6jvYb/u6i2tjk15sw7r4hMd8wiw6p02FfhtAwqfW2IA CoMn1Jp8s7C7h7Gli5u5yWy+noJCIlIw=
X-Google-Smtp-Source: AGHT+IGmt6s7R5G1ciYY3AEP8ecYB2jyqZxlkC3AvTPS5F1Ns2JJW6dB9BOUK0c23pJMjPq9Ecjso6CkNcn4Rf5FpWs=
X-Received: by 2002:a17:906:88d:b0:a51:9ff3:5394 with SMTP id n13-20020a170906088d00b00a519ff35394mr152149eje.39.1712256432162; Thu, 04 Apr 2024 11:47:12 -0700 (PDT)
Received: from 1064022179695 named unknown by gmailapi.google.com with HTTPREST; Thu, 4 Apr 2024 18:47:11 +0000
Received: from 1064022179695 named unknown by gmailapi.google.com with HTTPREST; Thu, 4 Apr 2024 18:47:08 +0000
MIME-Version: 1.0 (Mimestream 1.2.6)
References: <CAMMESszUUdDw-xnDtZKqz75g6SXZ+7mXtZujBKwN+hxypC-Kuw@mail.gmail.com> <CAMMESswF_NnpK7_xk9OXmmocU8P7pne0gmPjCkapXEQVfQA2zQ@mail.gmail.com> <CAHT6gR--Qw7W0ZqyfdEupTpLAjeJ5OLTTjzM6NvQ87zdizgb8Q@mail.gmail.com> <CAO42Z2xHNgzhmgC6mPrauSQZ6Q4mcgD_FOp_uWqRpz=pFwa7_w@mail.gmail.com> <CAHT6gR-q9B60fcvT7nTfErS8M+hUm+x8zoez0KkYiPtTthaYYg@mail.gmail.com> <CALx6S348-_7Xx8VsbdMpK3WLhprCWzx_hs-MQEPFdKtY8MMhrQ@mail.gmail.com> <CAHT6gR8oPH3o7FKx2pTSN=CbysCLcZ-pP98ZwuhGBxPNi0vSXA@mail.gmail.com> <CALx6S36c4tEbbiCAFLskQ1zSgi2the3H1_Sq8Jf7ZBhE=ezbFA@mail.gmail.com> <13993.1712250425@obiwan.sandelman.ca> <CALx6S377Q_S_hhF71NiB5NrAJZxyZqpCx6K5dMWruQQbdNu7tQ@mail.gmail.com>
In-Reply-To: <CALx6S377Q_S_hhF71NiB5NrAJZxyZqpCx6K5dMWruQQbdNu7tQ@mail.gmail.com>
From: Francois Clad <fclad.ietf@gmail.com>
Date: Thu, 04 Apr 2024 18:47:11 +0000
Message-ID: <CAHT6gR_g7M=oRpaXvE82PEENrX0uP8niKvDsRxoomniNLkOdCg@mail.gmail.com>
To: Tom Herbert <tom@herbertland.com>
Cc: 6man <ipv6@ietf.org>, SPRING WG List <spring@ietf.org>, spring-chairs@ietf.org, Michael Richardson <mcr+ietf@sandelman.ca>
Content-Type: multipart/alternative; boundary="000000000000674f42061549c444"
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/Wp49-SluJx3CUUA2rs6SzT701OM>
Subject: Re: [IPv6] Subject: Mandating SRH when using C-SIDs (draft-ietf-spring-srv6-srh-compression)
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 04 Apr 2024 18:47:18 -0000

 Hi Tom,

draft-ietf-6man-sids takes care of that [1].

As Michael suggested, tcpdump could use this block as a default with a CLI
override for operators using a different one.

[1] https://www.ietf.org/archive/id/draft-ietf-6man-sids-06.html#section-6

Thanks,
Francois

On 4 Apr 2024 at 19:12:26, Tom Herbert <tom@herbertland.com> wrote:

>
>
> On Thu, Apr 4, 2024, 1:08 PM Michael Richardson <mcr+ietf@sandelman.ca>
> wrote:
>
>>
>> Tom Herbert <tom=40herbertland.com@dmarc.ietf.org> wrote:
>>     >> Tcpdump can determine that this packet is steered onto an SRv6
>> path by
>>     >> checking if the DA matches the SRv6 SID block.
>>
>>     > That would require introducing external state to tcpdump for correct
>>     > operation. This would be a major divergence in both implementation
>> and
>>     > ops compared to how things work today.
>>
>> It wouldn't be that weird to have the new SID block in the source code,
>> with
>> an override from the command line.  No weirder than port 23==telnet.
>>
>
> Michael,
>
> 23 is well known port number registered with IANA? Is the SID block a
> globally reserved address space?
>
> Tom
>
>
>> --
>> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting
>> )
>>            Sandelman Software Works Inc, Ottawa and Worldwide
>>
>

v2.46.0 | Report a Bug | By Email | System Status