IETF Logo Mail Archive

Re: Flow label [not draft-han-6man-in-band-signaling-for-transport-qos-00.txt]

Tom Herbert <tom@herbertland.com> Fri, 20 October 2017 20:53 UTC

Return-Path: <tom@herbertland.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 1A42C133053 for <ipv6@ietfa.amsl.com>; Fri, 20 Oct 2017 13:53:57 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Level:
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=herbertland-com.20150623.gappssmtp.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 SZcrCoANaKLf for <ipv6@ietfa.amsl.com>; Fri, 20 Oct 2017 13:53:55 -0700 (PDT)
Received: from mail-qt0-x235.google.com (mail-qt0-x235.google.com [IPv6:2607:f8b0:400d:c0d::235]) (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 A3047132F7C for <ipv6@ietf.org>; Fri, 20 Oct 2017 13:53:55 -0700 (PDT)
Received: by mail-qt0-x235.google.com with SMTP id 8so20046345qtv.1 for <ipv6@ietf.org>; Fri, 20 Oct 2017 13:53:55 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=herbertland-com.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=RhgwjoMlZ/amGDUCVWlaCWB74w4+djiJami2PKs/9w0=; b=BxiJ5XEQ90te8+ewxva2fWNYn9ztki8dzM9v6RcE0Sm1yYZ/7Vbr2gxq8Lsaa5CUnq z+E5RHO87g9fDAQpMKg1o4KiW1NmJSFKKp8YpefMytBnoSCTZbCW44bjYkbxN8hzFqLx 5kA8Y1GNtwXbFk8GyRPVhW5HoNVN35RAa0nz1bkJ9x6aUU1UmPeZgxscG/x7UeG9k/CB uY2k0adcPzd5Y57LWUk/U8Lapv6ySEtbPiIQlt4Tq2qvHRNqJEdJTbxql78Lr5rtx0xk ZBXM6ej4A+5wYP3j8+a2rtBgk+ep5WT80lk5B3GB5E7aZ2InPBGUQXw7XDO3KvzvGoG8 OAdw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=RhgwjoMlZ/amGDUCVWlaCWB74w4+djiJami2PKs/9w0=; b=e8y7HaH4E1QG9P3rpkoBHNL8gMcuNI4nef5lRzMJY7VgKl1qhugSWg86b0yJdqzw4f rU1UH+hKdloVwZPpI9GQQ61ulrhKDPY/HCuefegMl3qYnw9+gLC+56SlzOmH2k3HznkV /+Rf9Fd9aBIZIyiR/op0FZzOwqF50ursvArXL0zsL6AIUfw8cJxdZrDvZFRn6iGe82aC iTgIB7SenZU4QvL4UPH5gC4L8IfYK59yvIBY40d1AYoo5AYGYTVrvme75len0SPPMCFP ZiNhQ6e5kEoXhNlUkNqSswJ9ZRNpsdW+q9F0HFw7f/0Yw+ST8kFzjikbAdHlavLYQm9B LrqQ==
X-Gm-Message-State: AMCzsaXG8k7GUuaqetXUBNfSHqeDet+ZzRfb6jyCPsIML/+rHLlWZOHp MoxZOS5ifR1866SOSpdVhK69Y+kwTjqwMErdyb80Dg==
X-Google-Smtp-Source: ABhQp+SThgd2k3V+joDpRHzPLRwSuYk8Yc4VMp8rfOxUjs42NCrYixTI9xgQ7yDYJoOWOFZA+zhjltCJpHqSWm8oPGA=
X-Received: by 10.200.55.101 with SMTP id p34mr9680535qtb.27.1508532834796; Fri, 20 Oct 2017 13:53:54 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.237.54.4 with HTTP; Fri, 20 Oct 2017 13:53:54 -0700 (PDT)
In-Reply-To: <2C4B0FD6-418E-441F-8B43-6C60451E3A51@cable.comcast.com>
References: <CALx6S341v1zd2Q9bts8-zrKxU59kieJTJJ=nHQ5w4oQZg=t_cA@mail.gmail.com> <17525287-DDA8-4930-B90B-F9228DF69A90@employees.org> <CALx6S37wLvuJ9tUGjYmzm63eq_bxq0jXSEgfCtH_2i74SvrbLA@mail.gmail.com> <20171017181646.GD31973@faui40p.informatik.uni-erlangen.de> <CALx6S34VRS4GumsFSqN8uDkv4TOLC8q+rOvyN=evUk83KPeHHg@mail.gmail.com> <20171019211637.GB878@faui40p.informatik.uni-erlangen.de> <296dd642b31741cc8ec4aa4b52913037@XCH15-06-11.nw.nos.boeing.com> <CALx6S36s_SoTqpPo=jXmrFC+pgUkEmF8UB_sx_0zGcK-G8JeTQ@mail.gmail.com> <20171019220935.GD878@faui40p.informatik.uni-erlangen.de> <33ff8930-d1af-ea54-7bb4-a6a9b289269e@gmail.com> <20171020144015.GA3093@faui40p.informatik.uni-erlangen.de> <8AE3421D-304B-42F9-B12A-361E21DFF069@employees.org> <CALx6S35nr8JapogAC5Gsi0iPxXhJa9NKOHhzUAnJtmqTwEGtgg@mail.gmail.com> <CDAEBFFD-3B70-41D3-BB41-FCF40ADA2115@employees.org> <CALx6S35Y7OVFFSiw4-ei84HEk0FjEXmS8TnNx8Uex9-0rAxdfg@mail.gmail.com> <2C4B0FD6-418E-441F-8B43-6C60451E3A51@cable.comcast.com>
From: Tom Herbert <tom@herbertland.com>
Date: Fri, 20 Oct 2017 13:53:54 -0700
Message-ID: <CALx6S34918E7jJtwezMBtqWE2sL5AGowNYUuHpYBSzOt0JW1-Q@mail.gmail.com>
Subject: Re: Flow label [not draft-han-6man-in-band-signaling-for-transport-qos-00.txt]
To: "Leddy, John" <John_Leddy@comcast.com>
Cc: Ole Troan <otroan@employees.org>, 6man WG <ipv6@ietf.org>
Content-Type: multipart/alternative; boundary="001a1145fa8cc0193f055c00ab65"
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/aF_VTJ8Zh2JyG-6a6Tm_8u6APjE>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.22
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: Fri, 20 Oct 2017 20:53:57 -0000

On Fri, Oct 20, 2017 at 12:06 PM, Leddy, John <John_Leddy@comcast.com>
wrote:

> In order packet delivery requirements considered harmful to the Internet…
>
>
>
> I’m assuming random per packet flow label assignments are within spec as
> long as they are set by the source.
>
>
>

Yes, there is no requirement that the flow label be persistent at all in a
flow. That gives some nice properties. For instance, at FB we implemented
flowbender using the flow label so that when a host detects a poor quality
path it can randomly try another flow label for the connection to hopefully
find a better path (a type of source routing). Random Packet Spraying could
use the flow label and randomly set it per packet to achieve perfect load
balancing in a multi-path network.

Tom

v2.23.0 | Report a Bug | By Email