Re: Header Insertion and TI-FA

Krzysztof Szarkowicz <kszarkowicz@gmail.com> Mon, 11 May 2020 15:07 UTC

Return-Path: <kszarkowicz@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 EB0363A091F for <ipv6@ietfa.amsl.com>; Mon, 11 May 2020 08:07:29 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.098
X-Spam-Level:
X-Spam-Status: No, score=-2.098 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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w8TQDR6xiotg for <ipv6@ietfa.amsl.com>; Mon, 11 May 2020 08:07:24 -0700 (PDT)
Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3F5E33A0814 for <6man@ietf.org>; Mon, 11 May 2020 08:07:15 -0700 (PDT)
Received: by mail-wr1-x435.google.com with SMTP id e16so11419519wra.7 for <6man@ietf.org>; Mon, 11 May 2020 08:07:15 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=YIFtgO0bSihcYj7hZPzxEnWNlfCGoT0oeXbKU2bD09c=; b=ZLzOKke5Y4XZsvQRgMpgSdQ9zS09RZxJ7I51s3VlCU5hCJ0qYusywowr2xTiDXvZbF rbBL4Y8Ft+z/qml1ckN9XBFd0RAr9g/p7dH5ZC6ERrY/xIqP9M6Cv7MjFOt6rErog991 2u8KVdH4mTQUjUkEm4o3JYLfk3N6BjbWjgI9Cu+9MrCOs2LafgVaYv+PLafg94bHJd9T ESprHc88A/CowCmkoK1VCnO8Gr5ehXdUlQV+lUHSRmnOjMn8JqjzgFi93tTBnTionSvs uUW/BJbVmren8SK6HEBSydlhLMP6zICDSw5zR1aJv4tUISKM3lETaAsYsOlzRxr4SkHn X3Jw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=YIFtgO0bSihcYj7hZPzxEnWNlfCGoT0oeXbKU2bD09c=; b=Q/UQuFTc/9AYkn2j1MOlJBnEZX5i0Aymq/Pu2Ks6Py9iUWig3xQMCSpr1h0zDzWADP LFCbbpjj5HxbdwLB4dSUwkgHtvnd9bPJlI2ux3FbaN+25SFZxKB1CwojIMBGqmPJl65R zLwEowekA40Nhu8x5Mp+wopsiSGhRSG4IXcKWPr5AuBUD/53+Pbf7yKBn21g/Ep62M5/ 9pFYUDzgztFTlthsUhzz4QSgxNxysh7dvEvodOin84OavW7BIyQvs3/H0gaWfbA4c8In a0bdPGeeBZva69aIHnvHumd2yFzqxX7j9GZN9jQ08zoS80WLaCkScCXKBYUCY2gf5foE 1OlQ==
X-Gm-Message-State: AGi0PubQ8vwz64nr/ohMNYjVh+OSVGl2DOUAsmTtOR9tkxC1LJtQJ6cp vlQ9IuYZJMGjZ4aGWxgaXXkMVoDrRaM=
X-Google-Smtp-Source: APiQypJbz/1WURV60G0VOsUHdbHYvCjbmJ5CoScHMFxpa1KCKhXXWVDIwHJxqaSTckZBd5ITf1vuCA==
X-Received: by 2002:adf:f784:: with SMTP id q4mr19682062wrp.102.1589209633727; Mon, 11 May 2020 08:07:13 -0700 (PDT)
Received: from kszarkowicz-mbp.jnpr.net (jpams-nat11.juniper.net. [193.110.49.11]) by smtp.gmail.com with ESMTPSA id q9sm3235810wmb.34.2020.05.11.08.07.12 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 May 2020 08:07:13 -0700 (PDT)
Content-Type: text/plain; charset="us-ascii"
Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\))
Subject: Re: Header Insertion and TI-FA
From: Krzysztof Szarkowicz <kszarkowicz@gmail.com>
In-Reply-To: <CAOj+MMEBVA+yK9cFXSe=GVUeH01ipi++nwCRQU_nQCxsKhyvRg@mail.gmail.com>
Date: Mon, 11 May 2020 17:07:11 +0200
Cc: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, 6man <6man@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <1B1A2C98-20F0-43F8-A299-C839D14A245C@gmail.com>
References: <DM6PR05MB6348FA1FC00258ACE4FDE444AEA10@DM6PR05MB6348.namprd05.prod.outlook.com> <CABNhwV3-dMPg6SAAEz+uWre-rj6j5=1JgyyQyKyz_qn7f7mJwQ@mail.gmail.com> <DM6PR05MB634848D379A428372C166DD4AEA10@DM6PR05MB6348.namprd05.prod.outlook.com> <CAOj+MMEBVA+yK9cFXSe=GVUeH01ipi++nwCRQU_nQCxsKhyvRg@mail.gmail.com>
To: Robert Raszuk <robert@raszuk.net>
X-Mailer: Apple Mail (2.3608.80.23.2.2)
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/lm0uowmT-2hN9CCxZLOMTnuICYY>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
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: Mon, 11 May 2020 15:07:36 -0000

Hi Robert,

If we have prepend, why bother with insertion at all? Prepend (6in6 encap) is much cleaner, IMHO.

Regards,
Krzysztof

> On 2020 -May-11, at 16:38, Robert Raszuk <robert@raszuk.net> wrote:
> 
> Hi Ron,
> 
> > normalizing header insertion for the special case where the PLR is a segment endpoint  
> 
> When an operator is serious about good data plane protection with TI-LFA all nodes in the network will be enabled for SR. The less overhead required for the protection the better. You may just not have a room for adding additional 40 bytes to each packet at each potential PLR without fragmentation. 
> 
> Regarding all of your other TI-LFA related questions - I am sure Krzysztof will be happy to answer them for you internally :)  After all this is what your public demo was all about .... 
> 
> Best,
> Robert,
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------