Re: [manet] DLEP required metrics

Rick Taylor <rick@tropicalstormsoftware.com> Fri, 04 May 2018 08:38 UTC

Return-Path: <rick@tropicalstormsoftware.com>
X-Original-To: manet@ietfa.amsl.com
Delivered-To: manet@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B8DA31241FC for <manet@ietfa.amsl.com>; Fri, 4 May 2018 01:38:11 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.901
X-Spam-Level:
X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
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 8b-lJ_QGw5Xf for <manet@ietfa.amsl.com>; Fri, 4 May 2018 01:38:09 -0700 (PDT)
Received: from mail.tropicalstormsoftware.com (mail.tropicalstormsoftware.com [188.94.42.120]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6A231127869 for <manet@ietf.org>; Fri, 4 May 2018 01:38:09 -0700 (PDT)
Received: from tss-server1.home.tropicalstormsoftware.com ([fe80::753b:fa82:5c0:af0d]) by tss-server1.home.tropicalstormsoftware.com ([fe80::753b:fa82:5c0:af0d%10]) with mapi; Fri, 4 May 2018 09:38:01 +0100
From: Rick Taylor <rick@tropicalstormsoftware.com>
To: "David.Wiggins@ll.mit.edu" <David.Wiggins@ll.mit.edu>, "hrogge@gmail.com" <hrogge@gmail.com>
CC: "manet@ietf.org" <manet@ietf.org>
Thread-Topic: [manet] DLEP required metrics
Thread-Index: AQHT42BTbmKPzLBglkWYv/LMbvZeMKQfLuOA
Date: Fri, 4 May 2018 08:37:57 +0000
Message-ID: <1525423077.8566.4.camel@tropicalstormsoftware.com>
References: <E95E649D-7618-4705-8611-A1C8EF2DD8FD@ll.mit.edu> <CAGnRvupmK2CYiccr9+mCg09EiAgojDKB66nWdOASw9cZdni51w@mail.gmail.com>
In-Reply-To: <CAGnRvupmK2CYiccr9+mCg09EiAgojDKB66nWdOASw9cZdni51w@mail.gmail.com>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Content-Type: text/plain; charset="utf-8"
Content-ID: <96e34ad3-ca6b-4132-81bd-87f71cf703df>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
Archived-At: <https://mailarchive.ietf.org/arch/msg/manet/0QPG4cXthmR72rcCIN-bbXYujzc>
Subject: Re: [manet] DLEP required metrics
X-BeenThere: manet@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Mobile Ad-hoc Networks <manet.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/manet>, <mailto:manet-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/manet/>
List-Post: <mailto:manet@ietf.org>
List-Help: <mailto:manet-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/manet>, <mailto:manet-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 04 May 2018 08:38:12 -0000

+1, Good answer Henning.

Rick

On Fri, 2018-05-04 at 04:27 +0000, Henning Rogge wrote:
> On Thu, May 3, 2018 at 11:34 PM Wiggins, David - 0665 - MITLL <
> David.Wiggins@ll.mit.edu> wrote:
> 
> > In RFC 8175, the following metrics are required in a Session
> 
> Initialization Response:
> 
> > Maximum Data Rate (Receive)
> > Maximum Data Rate (Transmit)
> > Current Data Rate (Receive)
> > Current Data Rate (Transmit)
> 
> I think these four should be no trouble... if you don't know the
> exact
> "current" bitrate, just report a fixed one... if you only support one
> bitrate at all, just report them both as maximum and current.
> 
> > Latency
> 
> This one is more tricky... just give it a guess... most modern
> "civil"
> technologies could easily report "1 millisecond"... only low
> bandwidth
> radios or satcom links should report something higher (if you don't
> know
> the "correct" value).
> 
> > If a modem doesn’t have a value for one or more of these metrics,
> > what
> 
> value should it use?  Ideally it would just omit the metric, but with
> the
> current RFC, that isn’t an option.   Note that these same metrics are
> optional in Destination Up and Update.
> 
> They are optional in Dest Up/Down because you are allowed to report a
> default value for all neighbors in the Session Initialization and it
> will
> just be valid for all neighbors.
> 
> Henning Rogge
> 
> _______________________________________________
> manet mailing list
> manet@ietf.org
> https://www.ietf.org/mailman/listinfo/manet