MPLS D. Frost, Ed.
Internet-Draft S. Bryant, Ed.
Intended status: Informational Cisco Systems
Expires: August 8, 2011 February 4, 2011
A Packet Loss and Delay Measurement Profile for MPLS-based Transport
Networks
draft-ietf-mpls-tp-loss-delay-profile-02
Abstract
Procedures and protocol mechanisms to enable the efficient and
accurate measurement of packet loss, delay, and throughput in MPLS
networks are defined in RFC XXXX.
The MPLS Transport Profile (MPLS-TP) is the set of MPLS protocol
functions applicable to the construction and operation of packet-
switched transport networks.
This document describes a profile of the general MPLS loss, delay,
and throughput measurement techniques that suffices to meet the
specific requirements of MPLS-TP.
This document is a product of a joint Internet Engineering Task Force
(IETF) / International Telecommunication Union Telecommunication
Standardization Sector (ITU-T) effort to include an MPLS Transport
Profile within the IETF MPLS and Pseudowire Emulation Edge-to-Edge
(PWE3) architectures to support the capabilities and functionalities
of a packet transport network as defined by the ITU-T.
This Informational Internet-Draft is aimed at achieving IETF
Consensus before publication as an RFC and will be subject to an IETF
Last Call.
[RFC Editor, please remove this note before publication as an RFC and
insert the correct Streams Boilerplate to indicate that the published
RFC has IETF consensus.]
[RFC Editor, please replace XXXX with the RFC number assigned to
draft-ietf-mpls-loss-delay.]
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
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Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
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."
This Internet-Draft will expire on August 8, 2011.
Copyright Notice
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
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
1. Introduction
Procedures for the measurement of packet loss, delay, and throughput
in MPLS networks are defined in [I-D.ietf-mpls-loss-delay]. This
document describes a profile, i.e. a simplified subset, of these
procedures that suffices to meet the specific requirements of MPLS-
based transport networks [RFC5921] as defined in [RFC5860]. This
profile is presented for the convenience of implementors who are
concerned exclusively with the transport network context.
The use of the profile specified in this document is purely optional.
Implementors wishing to provide enhanced functionality that is within
the scope of [I-D.ietf-mpls-loss-delay] but outside the scope of this
profile may do so, whether or not the implementation is restricted to
the transport network context.
The assumption of this profile is that the devices involved in a
measurement operation are configured for measurement by a means
external to the measurement protocols themselves, for example via a
Network Management System (NMS) or separate configuration protocol.
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This document is a product of a joint Internet Engineering Task Force
(IETF) / International Telecommunication Union Telecommunication
Standardization Sector (ITU-T) effort to include an MPLS Transport
Profile within the IETF MPLS and Pseudowire Emulation Edge-to-Edge
(PWE3) architectures to support the capabilities and functionalities
of a packet transport network as defined by the ITU-T.
2. Packet Loss Measurement (LM) Profile
When an LM session is externally configured, the values of several
protocol parameters can be fixed in advance at the endpoints involved
in the session, so that inspection or negotiation of these parameters
is not required. These parameters, and their default values as
specified by this profile, are as follows:
Parameter Default Value
----------------------------------------- --------------------------
Query control code In-band response requested
Byte/packet Count (B) Flag Packet count
Traffic-Class-specific (T) Flag Traffic-class-scoped
Origin Timestamp Format (OTF) IEEE 1588 version 1
This profile is restricted to direct-mode LM and therefore uses the
MPLS Direct Packet Loss Measurement (DLM) Channel Type in the
Associated Channel Header (ACH).
A simple implementation may assume that external configuration will
ensure that both ends of the communication are using the default
values for these parameters.
3. Packet Delay Measurement (DM) Profile
When a DM session is externally configured, the values of several
protocol parameters can be fixed in advance at the endpoints involved
in the session, so that inspection or negotiation of these parameters
is not required. These parameters, and their default values as
specified by this profile, are as follows:
Parameter Default Value
------------------------------------------ --------------------------
Query control code In-band response requested
Querier Timestamp Format (QTF) IEEE 1588 version 1
Responder Timestamp Format (RTF) IEEE 1588 version 1
Responder's Preferred Timestamp Format IEEE 1588 version 1
(RPTF)
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This profile uses the MPLS Delay Measurement (DM) Channel Type in the
Associated Channel Header (ACH).
A simple implementation may assume that external configuration will
ensure that both ends of the communication are using the default
values for these parameters.
4. Security Considerations
This document delineates a subset of the procedures specified in
[I-D.ietf-mpls-loss-delay], and as such introduces no new security
considerations in itself. The security considerations discussed in
[I-D.ietf-mpls-loss-delay] apply also to the profile presented in
this document.
5. IANA Considerations
This document introduces no new IANA considerations.
6. References
6.1. Normative References
[I-D.ietf-mpls-loss-delay]
Frost, D. and S. Bryant, "Packet Loss and Delay
Measurement for MPLS Networks",
draft-ietf-mpls-loss-delay-00 (work in progress),
December 2010.
[RFC5586] Bocci, M., Vigoureux, M., and S. Bryant, "MPLS Generic
Associated Channel", RFC 5586, June 2009.
[RFC5860] Vigoureux, M., Ward, D., and M. Betts, "Requirements for
Operations, Administration, and Maintenance (OAM) in MPLS
Transport Networks", RFC 5860, May 2010.
6.2. Informative References
[RFC5921] Bocci, M., Bryant, S., Frost, D., Levrau, L., and L.
Berger, "A Framework for MPLS in Transport Networks",
RFC 5921, July 2010.
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Authors' Addresses
Dan Frost (editor)
Cisco Systems
Email: danfrost@cisco.com
Stewart Bryant (editor)
Cisco Systems
Email: stbryant@cisco.com
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