Network Working Group Parag Jain, Ed.
Internet Draft Sami Boutros
Intended status: Standards Track Cisco Systems, Inc.
Expires: December 18, 2014
June 17, 2014
Definition of P2MP PW TLV for LSP-Ping Mechanisms
LSP-Ping is a widely deployed Operation, Administration, and
Maintenance (OAM) mechanism in MPLS networks. This document
describes a mechanism to verify connectivity of Point-to-Multipoint
(P2MP) Pseudowires (PW) using LSP Ping.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Internet-Drafts are draft documents valid for a maximum of six
months and may be updated, replaced, or obsoleted by other documents
at any time. It is inappropriate to use Internet-Drafts as
reference material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
The list of Internet-Draft Shadow Directories can be accessed at
This Internet-Draft will expire on December 28, 2011.
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
Jain Expires December 2014 [Page 1]
Internet-Draft draft-jain-pwe3-p2mp-pw-lsp-ping-03.txt June 2014
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with
respect to this document.
Table of Contents
1. Introduction 2
2. Conventions used in this document 3
3. Terminology 3
4. Identifying a P2MP PW 3
4.1. FEC 130 Pseudowire Sub-TLV 4
5. Operations 4
6. Echo Reply using Downstream Assigned Label 6
7. Controlling Echo Responses 6
8. Security Considerations 6
9. IANA Considerations 6
10. References 6
10.1. Normative References 6
10.2. Informative References 7
11. Acknowledgments 7
A Point-to-Multipoint (P2MP) Pseudowire (PW) emulates the essential
attributes of a unidirectional P2MP Telecommunications service such
as P2MP ATM over PSN. Requirements for P2MP PW are described in
[PPWREQ]. P2MP PWs are carried over P2MP MPLS LSP. The Procedure for
P2MP PW signaling using LDP for single segment P2MP PWs are
described in [PPWPWE3]. Many P2MP PWs can share the same P2MP MPLS
LSP and this arrangement is called Aggregate P-tree. The aggregate
P2MP trees require an upstream assigned label so that on the tail of
the P2MP LSP, the traffic can be associated with a VPN or a VPLS
instance. When a P2MP MPLS LSP carries only one VPN or VPLS service
instance, the arrangement is called Inclusive P-Tree. For Inclusive
P-Trees, P2MP MPLS LSP label itself can uniquely identify the VPN or
VPLS service being carried over P2MP MPLS LSP. The P2MP MPLS LSP can
also be used in Selective P-Tree arrangement for carrying multicast
traffic. In a Selective P-Tree arrangement, traffic to each