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Re: [manet] NHDP: Link quality based on seq-num
My, not fully worked out, thought is that per interface
packet sequence numbers should be allowed, or even
preferred. That leaves a procedural issue of how to get
from where we are to where we want to be.
--
Christopher Dearlove
Technology Leader, Communications Group
Networks, Security and Information Systems Department
BAE Systems Advanced Technology Centre
West Hanningfield Road, Great Baddow, Chelmsford, CM2 8HN, UK
Tel: +44 1245 242194 Fax: +44 1245 242124
BAE Systems (Operations) Limited
Registered Office: Warwick House, PO Box 87,
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-----Original Message-----
From: manet-bounces at ietf.org [mailto:manet-bounces at ietf.org] On Behalf Of Ulrich Herberg
Sent: 09 November 2009 10:18
To: Dearlove, Christopher (UK)
Cc: manet at ietf.org
Subject: Re: [manet] NHDP: Link quality based on seq-num
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I agree with Teco that issue is important, also for my performance
section in MIBs.
Ulrich
On Mon, Nov 9, 2009 at 7:00 PM, Dearlove, Christopher (UK)
<Chris.Dearlove at baesystems.com> wrote:
> Bother, I missed this one, both them and now.
>
> That requires some thought. Thanks to Teco for pointing this out.
> This was not the intent of course, I think this got put in in the
> various editing to pass reviews and was badly specified.
>
> --
> Christopher Dearlove
> Technology Leader, Communications Group
> Networks, Security and Information Systems Department
> BAE Systems Advanced Technology Centre
> West Hanningfield Road, Great Baddow, Chelmsford, CM2 8HN, UK
> Tel: +44 1245 242194 Fax: +44 1245 242124
>
> BAE Systems (Operations) Limited
> Registered Office: Warwick House, PO Box 87,
> Farnborough Aerospace Centre, Farnborough, Hants, GU14 6YU, UK
> Registered in England & Wales No: 1996687
>
> -----Original Message-----
> From: manet-bounces at ietf.org [mailto:manet-bounces at ietf.org] On Behalf Of Henning Rogge
> Sent: 09 November 2009 06:28
> To: manet at ietf.org
> Subject: Re: [manet] NHDP: Link quality based on seq-num
>
> On Mon November 9 2009 02:33:01 Teco Boot wrote:
>> In NHDP-11 14.4, it is suggested that a node should
>> receive all sequential packet sequence numbers from
>> its neighbors.
>> I think this is an invalid assumption. A node could
>> send packets out of multiple interfaces. Sequence
>> numbers are per packet, not (per packet, per interface).
> Packet sequence numbers should be interface specific I think. It doesn't make
> sense to make them node specific.
>
> Unfortunately Teco is right, we specified them differently in packetbb:
>
> o The <pkt-seq-num> field, if present, contains a sequence number
> that is incremented by 1 for each packet generated by a node. The
> sequence number after 65535 is 0. In other words, the sequence
> number "wraps" in the usual way.
>
> Henning Rogge
>
> --
> Diplom-Informatiker Henning Rogge , Fraunhofer-Institut für
> Kommunikation, Informationsverarbeitung und Ergonomie FKIE
> Kommunikationssysteme (KOM)
> Neuenahrer Straße 20, 53343 Wachtberg, Germany
> Telefon +49 228 9435-263, Fax +49 228 9435 685
> mailto:henning.rogge at fkie.fraunhofer.de http://www.fkie.fraunhofer.de
> GPG: E1C6 0914 490B 3909 D944 F80D 4487 C67C 55EC CFE0
>
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