IETF Logo Mail Archive

Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11

Robert Raszuk <robert@raszuk.net> Mon, 25 March 2024 17:05 UTC

Return-Path: <robert@raszuk.net>
X-Original-To: spring@ietfa.amsl.com
Delivered-To: spring@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 78D1BC15109A for <spring@ietfa.amsl.com>; Mon, 25 Mar 2024 10:05:28 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.105
X-Spam-Level:
X-Spam-Status: No, score=-2.105 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, HTML_MESSAGE=0.001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=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=raszuk.net
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 BenpfYz4CTOg for <spring@ietfa.amsl.com>; Mon, 25 Mar 2024 10:05:24 -0700 (PDT)
Received: from mail-ed1-x529.google.com (mail-ed1-x529.google.com [IPv6:2a00:1450:4864:20::529]) (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 99C98C180B56 for <spring@ietf.org>; Mon, 25 Mar 2024 10:04:05 -0700 (PDT)
Received: by mail-ed1-x529.google.com with SMTP id 4fb4d7f45d1cf-5688eaf1165so6371157a12.1 for <spring@ietf.org>; Mon, 25 Mar 2024 10:04:05 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=raszuk.net; s=google; t=1711386243; x=1711991043; 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=LSI/08wkCgxgqG2G1Ls1eH/Smg/4OlHOfb5F7ljvhU8=; b=FXuiYiHUJI4IDU3vlLyRgOJVmugJekj+g1BJzaFQNuX65hokp0V1PBc83/ek1D2qM0 MMtyBQFwTk5T4DppmKNMIwJ1U7kFXG1rjG4jlV6Nn6vhxtU6kJPbPkq1WPPIyStX1XY5 KIjZE3PoczjTrZTpMSZpbzW/ayBEydbdsPNDX/v1ER84xC/bRU8Kjyv9lEUgWDsWXeN+ XndjY+R05RMOskZZ+SEVqUjwstRiJQljRP95pHEB7FkUvEt1O8d01PWIaqMg+6lBmEuT Hzp7oVrcuZULu9SCngE3S49kiE6ekNcdX6c/tYtTBpqCGpKBqgELDJAQ05h9Sxs2qG5u m8AQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711386243; x=1711991043; 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=LSI/08wkCgxgqG2G1Ls1eH/Smg/4OlHOfb5F7ljvhU8=; b=rEnzs3VdeRHA4jozmEPsVJFqX8nGN7CFK0SK6K2JYu9s0OWhyz7PIVBYlu7FHUiVVR 3fgkS+2+dJgjZqaKqlCDytwP2xixNd4phZ3D7E80SSV/wvQw/Hx12AeFp8bMaaD2kn18 O8XkQbZCnjSuSTnrX23blJxopjaM0p5h/uVps0T7zMfV1JWX+RKk65yH6yenu4rRiFOK 6pICxfsOFhyh/TUaKGKWU9PsxYbSs8fG6tPHP/IizMTRd5o/D9a5q84VrG7vv2YzpbgI oCzdkeEFbx4eU/RDZPh2KTKQiRKx2EmKpc8t4TSYdlUsUY6u1ZHOtZZEnD94LCaCJH9w 2qxg==
X-Forwarded-Encrypted: i=1; AJvYcCVd3h59QHnfGabp662mfCdZo2I3LlrCk5oRuUpNZLc6zP6PwQ+Qc0zdbAc1GyvuNS57YMy40gV5kMKFh0gTddc=
X-Gm-Message-State: AOJu0YzSYtjyCxWrFSqjNzIfOJM6dT90C+ak6eYkpsSBtuXqccTNOh+a IHZfQn+hhzHMfSqizw9MrEcyUnTpLBHTQxeuiGoTk7lszrPciGuOTSORLvnU8c/em4AbeCuiM+n 4T+qD8jomn2WdPVG8IRipSjXYBr1dqdAVvt++iQ==
X-Google-Smtp-Source: AGHT+IFBde45jwrpnybvD21j7pYgZdhX8MQobyOXp6Owvl0BcHedzbFenMftS1M8tZmARpNMLto/eXNquN/gmQpKTH8=
X-Received: by 2002:a50:9e45:0:b0:567:23a2:5b1e with SMTP id z63-20020a509e45000000b0056723a25b1emr5416987ede.23.1711386243398; Mon, 25 Mar 2024 10:04:03 -0700 (PDT)
MIME-Version: 1.0
References: <CAMMESsw=PihfkO3nECiBnCALfCC=vTRn6c1_OYPK-jT5=yHFZA@mail.gmail.com> <CAHT6gR9ytPWVDBdSnoKmofzN2cfEQhS5siV-i405XMP-_=27hw@mail.gmail.com> <CAMMESsyTokFK6Ff8cFJYHSFF917FKfE22FL3e4URCfwNAyYZEA@mail.gmail.com> <CAHT6gR-ry4WgjUs+8OvFmzYwB9Gn-+0tUaaaXvTtk2FgiAB0JA@mail.gmail.com> <CAHT6gR-Zv75y1AjWJkg-D5hLc3O0KFsE51U8cvRvgc8n9bAE=w@mail.gmail.com> <DU2PR03MB80211A59BB7464AF835DFEE2FA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <BL0PR05MB531659043D056FFB4EB38BA7AE362@BL0PR05MB5316.namprd05.prod.outlook.com> <DU2PR03MB8021CBC7A097F17AE3F64102FA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CALx6S354yL2nRd6Xf4yzq7D+GbQQhYPPxRN58V3kQ0CaMQA+UQ@mail.gmail.com> <CAOj+MMGKA_Bf=sD7aivXMdhexy3gsPTkPp5_DY4hicSigm+cxA@mail.gmail.com> <DU2PR03MB802141D381DD2C716442D01DFA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CAOj+MMGWkyLqfk-PM8rTCyEpMLQDvujO3P6O=NxGQunB5GBxdA@mail.gmail.com> <DU2PR03MB8021817EDB0676FCDFC0FF3CFA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CAOj+MMEPZ4O1sTEUm4u-v72MwcptejNWLfcBvFJA98-2qDzzfg@mail.gmail.com> <DU2PR03MB8021CFB963C174317CF604E2FA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CAOj+MMFDrRq9igN16Dy0LXR=QiopdmHJbTd0SRT=_XdVGgjt+g@mail.gmail.com> <DU2PR03MB80213CDDFC54A4A9C456D654FA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CAOj+MMGyoo3afahjqfqK50E0NQRN6C-HyZ8HMaK7ZEegRhacsg@mail.gmail.com> <DU2PR03MB8021359DEE67FF457F914384FA362@DU2PR03MB8021.eurprd03.prod.outlook.com> <CAOj+MMHhKVBg2LDqDqZRzAiLLRfCcwv_3g2Jpmud1aLsF2hL_Q@mail.gmail.com> <CALx6S35FDPDMinDYxTL9Bj8bmjzx5q-JGWMTJObCn=uyVVfrZA@mail.gmail.com>
In-Reply-To: <CALx6S35FDPDMinDYxTL9Bj8bmjzx5q-JGWMTJObCn=uyVVfrZA@mail.gmail.com>
From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 25 Mar 2024 18:03:52 +0100
Message-ID: <CAOj+MMH95uErZXS7+02KQrguL6S96EzyP1qdf7sXAGtuCjMtxw@mail.gmail.com>
To: Tom Herbert <tom@herbertland.com>
Cc: Andrew Alston - IETF <andrew-ietf@liquid.tech>, Ron Bonica <rbonica@juniper.net>, "spring@ietf.org" <spring@ietf.org>
Content-Type: multipart/alternative; boundary="0000000000001c9b5e06147f2928"
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/MXOcERuaMT7HNFYyEoAZWf6Vdl8>
Subject: Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11
X-BeenThere: spring@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: "Source Packet Routing in NetworkinG \(SPRING\)" <spring.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/spring>, <mailto:spring-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/spring/>
List-Post: <mailto:spring@ietf.org>
List-Help: <mailto:spring-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/spring>, <mailto:spring-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Mar 2024 17:05:28 -0000

Hi Tom,

I don't think so, but I admit I may not be aware of some interesting use
cases ....

Many thx,
R.


On Mon, Mar 25, 2024 at 5:57 PM Tom Herbert <tom@herbertland.com> wrote:

> On Mon, Mar 25, 2024 at 9:40 AM Robert Raszuk <robert@raszuk.net> wrote:
> >
> >
> > Actually looking at this from the perspective where SRH may be omitted I
> see in the subject draft this clearly stated:
> >
> > A source node steers a packet into an SR Policy. If the SR Policy
> results in a Segment List containing a single segment, and there is no need
> to add information to the SRH flag or add TLV; the DA is set to the single
> Segment List entry, and the SRH MAY be omitted.¶
> >
> >
> > That to me indicated that host computed checksum will be correct all
> along the transit nodes. So no issue either here.
> >
> > Could someone illustrate with a drawing of packet's traversing the
> network their assumed header format and forseen issues ?
>
> Robert,
>
> Are there any cases in segment routing where the Destination Address
> is changed in flight and a routing header is not present in the
> packet?
>
> Tom
>
> >
> > Thx,
> > R,
> >
>

v2.23.0 | Report a Bug | By Email