IETF Logo Mail Archive

Re: [dtn-users] Delay in receiving files due to link down

Vangelis Anifantis <vangelis@netmode.ntua.gr> Sun, 12 July 2015 21:24 UTC

Return-Path: <vangelis@netmode.ntua.gr>
X-Original-To: dtn-users@ietfa.amsl.com
Delivered-To: dtn-users@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9B49B1A00B7 for <dtn-users@ietfa.amsl.com>; Sun, 12 Jul 2015 14:24:32 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 1.391
X-Spam-Level: *
X-Spam-Status: No, score=1.391 tagged_above=-999 required=5 tests=[BAYES_50=0.8, HTML_MESSAGE=0.001, J_CHICKENPOX_54=0.6, T_RP_MATCHES_RCVD=-0.01] autolearn=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 DTIV8OowP1OM for <dtn-users@ietfa.amsl.com>; Sun, 12 Jul 2015 14:24:30 -0700 (PDT)
Received: from ulysses.noc.ntua.gr (ulysses.noc.ntua.gr [IPv6:2001:648:2000:de::230]) by ietfa.amsl.com (Postfix) with ESMTP id 0F8EE1A0058 for <dtn-users@irtf.org>; Sun, 12 Jul 2015 14:24:29 -0700 (PDT)
Received: from netmode.ece.ntua.gr (dolly.netmode.ece.ntua.gr [147.102.13.10]) by ulysses.noc.ntua.gr (8.15.1/8.15.1) with ESMTPS id t6CLOSHN095179 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for <dtn-users@irtf.org>; Mon, 13 Jul 2015 00:24:28 +0300 (EEST) (envelope-from vangelis@netmode.ntua.gr)
X-Authentication-Warning: ulysses.noc.ntua.gr: Host dolly.netmode.ece.ntua.gr [147.102.13.10] claimed to be netmode.ece.ntua.gr
Received: from [192.168.1.4] (46-205-217.adsl.cyta.gr [46.103.205.217]) (authenticated bits=0) by netmode.ece.ntua.gr (8.14.4/8.14.3) with ESMTP id t6CLOE7M005607 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT) for <dtn-users@irtf.org>; Mon, 13 Jul 2015 00:24:15 +0300 (EEST) (envelope-from vangelis@netmode.ntua.gr)
Message-ID: <55A2DAFD.7080004@netmode.ntua.gr>
Date: Mon, 13 Jul 2015 00:24:13 +0300
From: Vangelis Anifantis <vangelis@netmode.ntua.gr>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
To: dtn-users@irtf.org
References: <CAN=tgUw6xUVJFet+wAKrUo66POLpJrvzsGAKpoPde2pf8PtBpw@mail.gmail.com>
In-Reply-To: <CAN=tgUw6xUVJFet+wAKrUo66POLpJrvzsGAKpoPde2pf8PtBpw@mail.gmail.com>
Content-Type: multipart/alternative; boundary="------------000900020505070108090807"
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (ulysses.noc.ntua.gr [147.102.222.230]); Mon, 13 Jul 2015 00:24:28 +0300 (EEST)
X-Virus-Scanned: clamav-milter 0.98.6 at ulysses.noc.ntua.gr
X-Virus-Status: Clean
Archived-At: <http://mailarchive.ietf.org/arch/msg/dtn-users/9TeBzzXsN5pRgFnBtLtXohFFOxA>
Subject: Re: [dtn-users] Delay in receiving files due to link down
X-BeenThere: dtn-users@irtf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "The Delay-Tolerant Networking Research Group \(DTNRG\) - Users." <dtn-users.irtf.org>
List-Unsubscribe: <https://www.irtf.org/mailman/options/dtn-users>, <mailto:dtn-users-request@irtf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dtn-users/>
List-Post: <mailto:dtn-users@irtf.org>
List-Help: <mailto:dtn-users-request@irtf.org?subject=help>
List-Subscribe: <https://www.irtf.org/mailman/listinfo/dtn-users>, <mailto:dtn-users-request@irtf.org?subject=subscribe>
X-List-Received-Date: Sun, 12 Jul 2015 21:24:32 -0000

Dear Rucha,

The time needed for recovering a link disruption depends on the
retry_interval parameter which stands for the seconds to wait between
attempts to re-open an unavailable link. It is initially set to
min_retry_interval and then doubles up to max_retry_interval. Thus, by
configuring, e.g., using the link command, the min_retry_interval and
the max_retry_interval, you can overcome your prob and achieve a quick
link recovery based on your needs (see also
http://dtn.sourceforge.net/DTN2/doc/manual/configuration.html#link ).

Best Regards,
--vangelis

-- 

OpenPGP public key ID: 
pub  4096R/A97BA940 <https://pgp.mit.edu/pks/lookup?op=get&search=0xDFB631A0A97BA940> 2014-11-15 Evangelos Anifantis <vangelis@netmode.ntua.gr> <https://pgp.mit.edu/pks/lookup?op=vindex&fingerprint=on&search=0xDFB631A0A97BA940>
	 Fingerprint=9759 E043 8873 9FD3 D095  C717 DFB6 31A0 A97B A940 
	


On 7/12/2015 9:46 PM, Rucha Vaidya wrote:
> Hello,
> I have installed dtn-2.9.0 and have deployed it on a network where I
> am checking it for connections which last for a very short time and
> then get disconnected. So I am currently using dtncpd and dtncp to
> transfer files from one node to another. However when the link is put
> down for some time and if I send a lot of files(even as less as 10)
> and then the link is put up it takes a lot of time for the files to
> get received by the dtncpd. As per our observations, the time taken
> was dependent on the duration for which the link was down and the
> number of files sent. Is there any configuration through which I can
> change this. Can it be made to tranfer atleast some files rather than
> nothing at all, because the application won't be possible if transfer
> doesn't happen in short duration.
> Along the lines I read: the RFC 5050
> <https://tools.ietf.org/html/rfc5050> Bundle Protocol specification
> includes "bulk", "normal", and "expedited" markings. Does dtncpd have
> this which might help me in solving the above problem?
>
> Thanks
> Rucha
>
>
> _______________________________________________
> dtn-users mailing list
> dtn-users@irtf.org
> https://www.irtf.org/mailman/listinfo/dtn-users

v2.23.0 | Report a Bug | By Email