Re: [Idr] [spring] I-D Action: draft-ietf-idr-performance-routing-02.txt

"UTTARO, JAMES" <ju1738@att.com> Wed, 16 October 2019 11:59 UTC

Return-Path: <ju1738@att.com>
X-Original-To: idr@ietfa.amsl.com
Delivered-To: idr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 62156120926; Wed, 16 Oct 2019 04:59:18 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.599
X-Spam-Level:
X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=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 DAzycA1Qn6h9; Wed, 16 Oct 2019 04:59:16 -0700 (PDT)
Received: from mx0a-00191d01.pphosted.com (mx0b-00191d01.pphosted.com [67.231.157.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6CDDB120913; Wed, 16 Oct 2019 04:59:16 -0700 (PDT)
Received: from pps.filterd (m0049463.ppops.net [127.0.0.1]) by m0049463.ppops.net-00191d01. (8.16.0.42/8.16.0.42) with SMTP id x9GBswt8027633; Wed, 16 Oct 2019 07:59:08 -0400
Received: from alpi155.enaf.aldc.att.com (sbcsmtp7.sbc.com [144.160.229.24]) by m0049463.ppops.net-00191d01. with ESMTP id 2vp1pyh5y9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 16 Oct 2019 07:59:07 -0400
Received: from enaf.aldc.att.com (localhost [127.0.0.1]) by alpi155.enaf.aldc.att.com (8.14.5/8.14.5) with ESMTP id x9GBx72u029009; Wed, 16 Oct 2019 07:59:07 -0400
Received: from zlp27129.vci.att.com (zlp27129.vci.att.com [135.66.87.42]) by alpi155.enaf.aldc.att.com (8.14.5/8.14.5) with ESMTP id x9GBx3H2028960 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 16 Oct 2019 07:59:03 -0400
Received: from zlp27129.vci.att.com (zlp27129.vci.att.com [127.0.0.1]) by zlp27129.vci.att.com (Service) with ESMTP id 4EAD9403929E; Wed, 16 Oct 2019 11:59:03 +0000 (GMT)
Received: from MISOUT7MSGHUBAC.ITServices.sbc.com (unknown [130.9.129.147]) by zlp27129.vci.att.com (Service) with ESMTPS id 3AF7A4039187; Wed, 16 Oct 2019 11:59:03 +0000 (GMT)
Received: from MISOUT7MSGUSRCD.ITServices.sbc.com ([169.254.4.106]) by MISOUT7MSGHUBAC.ITServices.sbc.com ([130.9.129.147]) with mapi id 14.03.0468.000; Wed, 16 Oct 2019 07:59:02 -0400
From: "UTTARO, JAMES" <ju1738@att.com>
To: Ondrej Zajicek <santiago@crfreenet.org>, =?utf-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= <xiaohu.xxh@alibaba-inc.com>
CC: idr <idr@ietf.org>, SPRING WG List <spring@ietf.org>
Thread-Topic: [spring] [Idr] I-D Action: draft-ietf-idr-performance-routing-02.txt
Thread-Index: AQHVhAVbv+hSMLRf3EKHHbM5+UINIqddKaKg
Date: Wed, 16 Oct 2019 11:59:02 +0000
Message-ID: <B17A6910EEDD1F45980687268941550F4DA16463@MISOUT7MSGUSRCD.ITServices.sbc.com>
References: <157102976688.20872.8891510157374456894@ietfa.amsl.com> <eaac2838-0c1d-400f-9913-b30ac9cfdbf0.> <cfdb4bb4-cd42-4717-af35-a70447a8ac79.xiaohu.xxh@alibaba-inc.com> <20191016093720.GA2427@feanor.crfreenet.org>
In-Reply-To: <20191016093720.GA2427@feanor.crfreenet.org>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [130.10.123.45]
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-16_04:, , signatures=0
X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=962 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910160108
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/fUJYuYJYbMQzcdsJCsgL0Ma5SH4>
Subject: Re: [Idr] [spring] I-D Action: draft-ietf-idr-performance-routing-02.txt
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Inter-Domain Routing <idr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/idr>, <mailto:idr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/idr/>
List-Post: <mailto:idr@ietf.org>
List-Help: <mailto:idr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/idr>, <mailto:idr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Oct 2019 11:59:25 -0000

At the time the notion was that one could define addl TLVs to suit one's routing design.. The use case I had and still do in mind is a BGP 3107 topology to carry NHs across a set of stripped IGPs, this seems to deviate from that model.

Thanks,
	Jim Uttaro

-----Original Message-----
From: spring <spring-bounces@ietf.org>; On Behalf Of Ondrej Zajicek
Sent: Wednesday, October 16, 2019 5:37 AM
To: 徐小虎(义先) <xiaohu.xxh@alibaba-inc.com>;
Cc: idr <idr@ietf.org>;; SPRING WG List <spring@ietf.org>;
Subject: Re: [spring] [Idr] I-D Action: draft-ietf-idr-performance-routing-02.txt

Hi

My main objection to the draft is it uses separate SAFI to signal that
latency based routing is used. I don't think that is a good idea. Latency
based routing is a general concept, which makes sense to use with several
existing SAFIs (at least 1, 4 and 128). Whether or not announce and
use NETWORK_LATENCY TLV should be an independent session property, like
using AIGP TLV or e.g. ADD-PATH extension.

This is an issue that was underspecified in RFC 7311, just kept by
configuration of both sides. Perhaps we need a new capability to specify
which AIGP TLVs (if any) are supposed to be used on the session, so it
can be negotiated automatically like ADD-PATH.

-- 
Ondrej 'Santiago' Zajicek (email: santiago@crfreenet.org)

_______________________________________________
spring mailing list
spring@ietf.org
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_spring&d=DwICAg&c=LFYZ-o9_HUMeMTSQicvjIg&r=s7ZzB4JbPv3nYuoSx5Gy8Q&m=nTDIog7BhaHv2SH9PKmzhZAYEnJisvMqEfHsCyZoQ2E&s=fzT3zdTC_W3QtjsM2DSzNWzm3QE36Ug8Vc6zI1Mjwbo&e=