Re: [Dime] Benoit Claise's No Objection on draft-ietf-dime-drmp-05: (with COMMENT)
Benoit Claise <bclaise@cisco.com> Wed, 11 May 2016 16:53 UTC
Return-Path: <bclaise@cisco.com>
X-Original-To: dime@ietfa.amsl.com
Delivered-To: dime@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3AFEE12D507; Wed, 11 May 2016 09:53:09 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -15.517
X-Spam-Level:
X-Spam-Status: No, score=-15.517 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.996, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.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 6IKOpSfVA2_K; Wed, 11 May 2016 09:53:08 -0700 (PDT)
Received: from rcdn-iport-7.cisco.com (rcdn-iport-7.cisco.com [173.37.86.78]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B17DB12D0C3; Wed, 11 May 2016 09:53:07 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3172; q=dns/txt; s=iport; t=1462985587; x=1464195187; h=subject:to:references:cc:from:message-id:date: mime-version:in-reply-to:content-transfer-encoding; bh=aMdKAMFK5omEItNMuwXeg2cmKcblYH1GpJyl/H/N1y8=; b=jk3lhV3gqcJKoMlLwZ6I4wggoZuzpirylgqxrMf+vPAQqNKDU/Ia0M/E EHoxXuJVKGjTcVZ4QXCwJgEHC62AfBSJzg5muzN+7DQB9iKAMtUwIzh0a sKWWau3xUqY32FF2rMTp3FJNz2hK7PbVHEVH9CRoFeIos58qriXwcIXL4 M=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: A0AWAgCSYjNX/40NJK1egzi4c4IPAQ2BdoYUAoE6OBQBAQEBAQEBZSeEQwEBBDhAARALDgoJFg8JAwIBAgFFBgEMCAEBiCu6GAEBAQEBAQEBAQEBAQEBAQEBGYYghEyEKYVvAQSYJ44egWmET4MHhVqPQR4BAUKCNoFRIIk8AQEB
X-IronPort-AV: E=Sophos;i="5.24,608,1454976000"; d="scan'208";a="101488562"
Received: from alln-core-8.cisco.com ([173.36.13.141]) by rcdn-iport-7.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 11 May 2016 16:53:06 +0000
Received: from [10.86.255.17] ([10.86.255.17]) by alln-core-8.cisco.com (8.14.5/8.14.5) with ESMTP id u4BGr5xB012590; Wed, 11 May 2016 16:53:06 GMT
To: Steve Donovan <srdonovan@usdonovans.com>, Ben Campbell <ben@nostrum.com>
References: <20160504170252.8246.93112.idtracker@ietfa.amsl.com> <1D4B3862-3423-4618-B0ED-103B99BBC79F@nostrum.com> <572F2C8F.9070300@cisco.com> <57324FA2.3030607@usdonovans.com>
From: Benoit Claise <bclaise@cisco.com>
Message-ID: <57336371.2090103@cisco.com>
Date: Wed, 11 May 2016 12:53:05 -0400
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2
MIME-Version: 1.0
In-Reply-To: <57324FA2.3030607@usdonovans.com>
Content-Type: text/plain; charset="windows-1252"; format="flowed"
Content-Transfer-Encoding: 7bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/dime/uYH8phK3Ju_PTMhIdU4EKpR3bbQ>
Cc: draft-ietf-dime-drmp@ietf.org, dime-chairs@ietf.org, dime@ietf.org, The IESG <iesg@ietf.org>
Subject: Re: [Dime] Benoit Claise's No Objection on draft-ietf-dime-drmp-05: (with COMMENT)
X-BeenThere: dime@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Diameter Maintanence and Extentions Working Group <dime.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dime>, <mailto:dime-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dime/>
List-Post: <mailto:dime@ietf.org>
List-Help: <mailto:dime-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dime>, <mailto:dime-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 11 May 2016 16:53:09 -0000
On 5/10/2016 5:16 PM, Steve Donovan wrote: > Benoit, > > Please see my comments inline. > > Regards, > > Steve > > On 5/8/16 7:09 AM, Benoit Claise wrote: >> Ben, >>> I will jump in on one point, since this is related to the discussion >>> on whether nodes need a common approach to selecting/interpreting >>> priority values: >>> >>> On 4 May 2016, at 12:02, Benoit Claise wrote: >>> >>>> >>>> - >>>> >>>> 1. Request sender - The sender of a request, be it a Diameter Client >>>> or a Diameter Server, determines the relative priority of the >>>> request and includes that priority information in the request. >>>> >>>> Question: what is the risk of DMRP ending up as the DSCP, i.e. >>>> Every end point changes the value to best service, and in the end, >>>> it's >>>> useless, and uniquely set by the operator. >>> >>> I think there's a trusted network assumption here, which would >>> include an assumption that trusted clients do not intentionally game >>> the system. (in contrast with _accidentally_ gaming the system by >>> using a different scheme to set priority values.) >>> >>> However, I think that this sort of assumption should be explicitly >>> mentioned. >> I believe so. >>> IIRC, DOIC included some guidance about crossing trust boundaries; >>> perhaps DRMP should do the same. >> Yes. >> That makes me think. I wonder how the following two statements are >> interoperable? >> >> Diameter nodes MUST have a default priority to apply to transactions >> that do not have an explicit priority set in the DRMP AVP. >> >> Diameter nodes SHOULD use the PRIORITY_10 priority as this default >> value. >> >> >> Shouldn't the last SHOULD be a MUST? > SRD> The reason it is a SHOULD is to allow for an operator to define a > priority scheme with a different value, much as you outline below. >> >> Let me explain: a Diameter node wants to send Diameter messages with >> priority above average, so PRIORITY = 12 (because his default is 10). >> Along the path (potentially crossing a boundary), a Diameter node >> doesn't support the DRMP AVP. The next node, which does, sets his >> default priority. The default priority on that node has been >> configured as 13. And now, my Diameter messages will be treated as >> below average. >> Do I miss anything? > SRD> Yes, as described, this would be an issue. This is one of the > reasons that the DISCUSS threads have focused on the need to emphasize > that this mechanism only works if a consistent priority scheme is > applied to all messages and that it only works within a trusted > environment. BC> This assumption should be spelled out. > This implies that priority values received from other Diameter > networks likely can't be trusted. > > SRD> It may be necessary to add a requirement that the priority value > MUST be the same for all nodes within the Diameter network using a > defined priority scheme. BC> That would help yes. regards, B. >> >> Regards, Benoit >> >>> >>> (And I guess that does make it a bit like DSCP ;-) ) >>> >>> Ben. >>> . >>> >> > > . >
- [Dime] Benoit Claise's No Objection on draft-ietf… Benoit Claise
- Re: [Dime] Benoit Claise's No Objection on draft-… Ben Campbell
- Re: [Dime] Benoit Claise's No Objection on draft-… Steve Donovan
- Re: [Dime] Benoit Claise's No Objection on draft-… Benoit Claise
- Re: [Dime] Benoit Claise's No Objection on draft-… Steve Donovan
- Re: [Dime] Benoit Claise's No Objection on draft-… Benoit Claise