IETF Logo Mail Archive

Re: [mpls] MPLS-RT review of draft-bonica-mpls-self-ping

Ronald Bonica <rbonica@juniper.net> Thu, 12 March 2015 02:33 UTC

Return-Path: <rbonica@juniper.net>
X-Original-To: mpls@ietfa.amsl.com
Delivered-To: mpls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AAEA21A8A1A for <mpls@ietfa.amsl.com>; Wed, 11 Mar 2015 19:33:40 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -101.901
X-Spam-Level:
X-Spam-Status: No, score=-101.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=ham
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 YbxLvbIrRxiI for <mpls@ietfa.amsl.com>; Wed, 11 Mar 2015 19:33:38 -0700 (PDT)
Received: from na01-bn1-obe.outbound.protection.outlook.com (mail-bn1on0758.outbound.protection.outlook.com [IPv6:2a01:111:f400:fc10::758]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 16EB31A89F2 for <mpls@ietf.org>; Wed, 11 Mar 2015 19:33:38 -0700 (PDT)
Received: from CO1PR05MB444.namprd05.prod.outlook.com (10.141.73.140) by CO1PR05MB492.namprd05.prod.outlook.com (10.141.71.149) with Microsoft SMTP Server (TLS) id 15.1.99.14; Thu, 12 Mar 2015 02:33:21 +0000
Received: from CO1PR05MB442.namprd05.prod.outlook.com (10.141.73.146) by CO1PR05MB444.namprd05.prod.outlook.com (10.141.73.140) with Microsoft SMTP Server (TLS) id 15.1.106.15; Thu, 12 Mar 2015 02:33:19 +0000
Received: from CO1PR05MB442.namprd05.prod.outlook.com ([169.254.13.61]) by CO1PR05MB442.namprd05.prod.outlook.com ([169.254.13.61]) with mapi id 15.01.0106.007; Thu, 12 Mar 2015 02:33:19 +0000
From: Ronald Bonica <rbonica@juniper.net>
To: "lizho.jin@gmail.com" <lizho.jin@gmail.com>, mpls-chairs <mpls-chairs@tools.ietf.org>, draft-bonica-mpls-self-ping <draft-bonica-mpls-self-ping@tools.ietf.org>, mpls-ads <mpls-ads@tools.ietf.org>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Thread-Topic: MPLS-RT review of draft-bonica-mpls-self-ping
Thread-Index: AQHQUBZCJvzLYgooPEWTjWPAAzQbFJ0V/JCHgAIxJYA=
Date: Thu, 12 Mar 2015 02:33:18 +0000
Message-ID: <CO1PR05MB4423031D23F62C02BFA1E8DAE060@CO1PR05MB442.namprd05.prod.outlook.com>
References: <54EC4776.5040402@pi.nu> <2015031100220789189743@gmail.com>
In-Reply-To: <2015031100220789189743@gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [66.129.241.13]
authentication-results: spf=none (sender IP is ) smtp.mailfrom=rbonica@juniper.net;
x-microsoft-antispam: UriScan:; BCL:0; PCL:0; RULEID:; SRVR:CO1PR05MB444; UriScan:; BCL:0; PCL:0; RULEID:; SRVR:CO1PR05MB492;
x-forefront-antispam-report: BMV:1; SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(37854004)(74316001)(230783001)(122556002)(87936001)(86362001)(40100003)(2656002)(19625215002)(105586002)(33656002)(106116001)(99286002)(19300405004)(97736003)(19580395003)(101416001)(19609705001)(106356001)(76576001)(50986999)(46102003)(2501003)(64706001)(92566002)(68736005)(76176999)(54356999)(16236675004)(2950100001)(2900100001)(62966003)(102836002)(77156002)(15975445007)(66066001); DIR:OUT; SFP:1102; SCL:1; SRVR:CO1PR05MB444; H:CO1PR05MB442.namprd05.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:;
x-microsoft-antispam-prvs: <CO1PR05MB4443EC63E726A72805EC956AE060@CO1PR05MB444.namprd05.prod.outlook.com>
x-exchange-antispam-report-test: UriScan:;
x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(601004)(5002009)(5005006); SRVR:CO1PR05MB444; BCL:0; PCL:0; RULEID:; SRVR:CO1PR05MB444;
x-forefront-prvs: 05134F8B4F
received-spf: None (protection.outlook.com: juniper.net does not designate permitted sender hosts)
Content-Type: multipart/alternative; boundary="_000_CO1PR05MB4423031D23F62C02BFA1E8DAE060CO1PR05MB442namprd_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Mar 2015 02:33:18.8754 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: bea78b3c-4cdb-4130-854a-1d193232e5f4
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR05MB444
X-OriginatorOrg: juniper.net
Archived-At: <http://mailarchive.ietf.org/arch/msg/mpls/xBsyqCNZGox4qPKoF2LjsD_z9hM>
Cc: mpls <mpls@ietf.org>
Subject: Re: [mpls] MPLS-RT review of draft-bonica-mpls-self-ping
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Multi-Protocol Label Switching WG <mpls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mpls>, <mailto:mpls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mpls/>
List-Post: <mailto:mpls@ietf.org>
List-Help: <mailto:mpls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mpls>, <mailto:mpls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 12 Mar 2015 02:33:40 -0000

Carlos, Lizhong,

In your reviews, you correctly assert that MPLS Self-Ping will fail if both of the following conditions are true:


-          uRPF is enabled interfaces that connect the ingress and egress LSRs to the network interior

-          Either the penultimate LSR pops the label or the egress LSR performs uRPF checking *after* removing the label

Fortunately, in networks where RSVP-TE is enabled, uRPF is rarely enabled on interfaces connecting to the network interior. This is because a traffic engineered LSP is likely to deliver a packet on an interface other than the one expected by uRPF.

I will note this in the next version of the draft.

                                                                               Ron

v2.23.0 | Report a Bug | By Email