IETF Logo Mail Archive

[babel] info-model: calculated and received metrics

"STARK, BARBARA H" <bs7652@att.com> Thu, 18 April 2019 20:34 UTC

Return-Path: <bs7652@att.com>
X-Original-To: babel@ietfa.amsl.com
Delivered-To: babel@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DA36612015D for <babel@ietfa.amsl.com>; Thu, 18 Apr 2019 13:34:12 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.238
X-Spam-Level:
X-Spam-Status: No, score=-1.238 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, KHOP_DYNAMIC=1.363, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=no 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 xE2RA4f4r69u for <babel@ietfa.amsl.com>; Thu, 18 Apr 2019 13:34:12 -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 13F32120156 for <babel@ietf.org>; Thu, 18 Apr 2019 13:34:12 -0700 (PDT)
Received: from pps.filterd (m0049462.ppops.net [127.0.0.1]) by m0049462.ppops.net-00191d01. (8.16.0.27/8.16.0.27) with SMTP id x3IKSaAn027654 for <babel@ietf.org>; Thu, 18 Apr 2019 16:34:10 -0400
Received: from alpi154.enaf.aldc.att.com (sbcsmtp6.sbc.com [144.160.229.23]) by m0049462.ppops.net-00191d01. with ESMTP id 2rxym3skdr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for <babel@ietf.org>; Thu, 18 Apr 2019 16:34:10 -0400
Received: from enaf.aldc.att.com (localhost [127.0.0.1]) by alpi154.enaf.aldc.att.com (8.14.5/8.14.5) with ESMTP id x3IKYAKL032005 for <babel@ietf.org>; Thu, 18 Apr 2019 16:34:10 -0400
Received: from zlp30488.vci.att.com (zlp30488.vci.att.com [135.47.91.93]) by alpi154.enaf.aldc.att.com (8.14.5/8.14.5) with ESMTP id x3IKY3DP031893 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for <babel@ietf.org>; Thu, 18 Apr 2019 16:34:04 -0400
Received: from zlp30488.vci.att.com (zlp30488.vci.att.com [127.0.0.1]) by zlp30488.vci.att.com (Service) with ESMTP id D554E400A0A7 for <babel@ietf.org>; Thu, 18 Apr 2019 20:34:03 +0000 (GMT)
Received: from GAALPA1MSGHUBAC.ITServices.sbc.com (unknown [130.8.218.152]) by zlp30488.vci.att.com (Service) with ESMTPS id C45F2400A0A2 for <babel@ietf.org>; Thu, 18 Apr 2019 20:34:03 +0000 (GMT)
Received: from GAALPA1MSGUSRBF.ITServices.sbc.com ([169.254.5.160]) by GAALPA1MSGHUBAC.ITServices.sbc.com ([130.8.218.152]) with mapi id 14.03.0439.000; Thu, 18 Apr 2019 16:34:00 -0400
From: "STARK, BARBARA H" <bs7652@att.com>
To: 'Babel at IETF' <babel@ietf.org>
Thread-Topic: info-model: calculated and received metrics
Thread-Index: AdT2IrfeBlDu4vVISWCthPLc0HSMMg==
Date: Thu, 18 Apr 2019 20:33:59 +0000
Message-ID: <2D09D61DDFA73D4C884805CC7865E6114E151182@GAALPA1MSGUSRBF.ITServices.sbc.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [135.70.206.27]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-04-18_10:, , 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=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=719 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904180123
Archived-At: <https://mailarchive.ietf.org/arch/msg/babel/mTHVp6nHQtxuER-Tr2H7An_JsMw>
Subject: [babel] info-model: calculated and received metrics
X-BeenThere: babel@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "A list for discussion of the Babel Routing Protocol." <babel.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/babel>, <mailto:babel-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/babel/>
List-Post: <mailto:babel@ietf.org>
List-Help: <mailto:babel-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/babel>, <mailto:babel-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 18 Apr 2019 20:34:13 -0000

This was discussed in Prague, but I think it still didn't come to the right conclusion (in my head) as I look at it again.

>From reading rfc6126bis, it appears that 
 - all routes advertised by neighbors will have a received metric
 - all routes advertised by this router will have a calculated metric
 - routes originated by this router will not have a received metric
 - routes with infinite received metrics don't need a calculated metric

For a route to exist in the info model babel-routes object, either the received or calculated metric MUST be non-zero (rfc6126bis only mentions the received metric as being in its route table).
Both parameters will be non-zero if the route is received and selected.
Both parameters are important and need to be implemented.

Are these accurate statements?
Barbara

v2.23.0 | Report a Bug | By Email