Re: [Sigtran] Simultaneous support single exchange and double exchange in M3UA
"Brian F. G. Bidulock" <bidulock@openss7.org> Sun, 18 August 2013 12:33 UTC
Return-Path: <bidulock@openss7.org>
X-Original-To: sigtran@ietfa.amsl.com
Delivered-To: sigtran@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix)
with ESMTP id E5F7A21F98AD for <sigtran@ietfa.amsl.com>;
Sun, 18 Aug 2013 05:33:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -5.999
X-Spam-Level:
X-Spam-Status: No, score=-5.999 tagged_above=-999 required=5
tests=[BAYES_00=-2.599, J_CHICKENPOX_12=0.6, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com
[127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rs7T5wk-zIvk for
<sigtran@ietfa.amsl.com>; Sun, 18 Aug 2013 05:33:16 -0700 (PDT)
Received: from gw.openss7.com (gw.openss7.com [142.59.210.7]) by
ietfa.amsl.com (Postfix) with ESMTP id 489D411E8100 for <sigtran@ietf.org>;
Sun, 18 Aug 2013 05:33:15 -0700 (PDT)
Received: from wilbur.pigworks.openss7.net (ns5.evil.openss7.net
[192.168.9.5]) by gw.openss7.com (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP
id r7ICXAPd006568; Sun, 18 Aug 2013 06:33:10 -0600
Received: from wilbur.pigworks.openss7.net (localhost [127.0.0.1]) by
wilbur.pigworks.openss7.net (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP id
r7ICXA9q001727; Sun, 18 Aug 2013 06:33:10 -0600
Received: (from brian@localhost) by wilbur.pigworks.openss7.net
(8.14.3/8.14.3/Submit) id r7ICXA7Q001726; Sun, 18 Aug 2013 06:33:10 -0600
Date: Sun, 18 Aug 2013 06:33:10 -0600
From: "Brian F. G. Bidulock" <bidulock@openss7.org>
To: Kevin Peterson <qh.resu01@gmail.com>
Message-ID: <20130818123310.GB1435@openss7.org>
Mail-Followup-To: Kevin Peterson <qh.resu01@gmail.com>, sigtran@ietf.org
References: <abcd1234abc123ab12a0000009139000010000005002@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <abcd1234abc123ab12a0000009139000010000005002@gmail.com>
Organization: http://www.openss7.org/
Dsn-Notification-To: <bidulock@openss7.org>
X-Spam-To: <blockme@openss7.com>
User-Agent: Mutt/1.5.18 (2008-05-17)
Cc: sigtran@ietf.org
Subject: Re: [Sigtran] Simultaneous support single exchange and
double exchange in M3UA
X-BeenThere: sigtran@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
Reply-To: bidulock@openss7.org
List-Id: Signaling Transport <sigtran.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/sigtran>,
<mailto:sigtran-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/sigtran>
List-Post: <mailto:sigtran@ietf.org>
List-Help: <mailto:sigtran-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/sigtran>,
<mailto:sigtran-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 18 Aug 2013 12:33:21 -0000
Kevin, SE support is mandatory. DE support is optional. Therefore, when an implementation supports DE it must also support SE. Some implementations might only support one model at a time for a given AS/ASP, but that is a (minor) limitiation of that implementation. There is no need for negotiation: all implementations supporting IPSP MUST support SE: so just use that. Nevertheless, when an IPSP sends an ASP-UP message and receives an ASP-UP message in response, or sends an ASP-ACTIVE message and receives an ASP-ACTIVE message in response, it can determine that the peer is using DE mode and proceed accordingly. It can also determine DE mode from REGREQ messages in a similar manner when registration is used. --brian Kevin Peterson wrote: (Sun, 18 Aug 2013 06:20:54) > Hi, > > Can one implementation support single exchange and double exchange > models of IPSP at the same time ? Or does it have to be configured and > only one of the models can be active at a time ? Is there any M3UA > procedure which can help in dynamic negotiation of SE/DE models. > -- Brian F. G. Bidulock bidulock@openss7.org http://www.openss7.org/
- [Sigtran] Simultaneous support single exchange an… Kevin Peterson
- Re: [Sigtran] Simultaneous support single exchang… Brian F. G. Bidulock