Recently published IETF RFCs relevant to GMPLS, Optical Transport Networks,
and Packet Transport Networks
The IETF's CCAMP working group is pleased to inform Study Group 15 of the
ITU-T of the publication of several new RFCs that are relevant to the work
that you are doing with optical and packet transport networks. Several of
these RFCs received useful review and input from Study Group 15 participants
for which CCAMP would like to express its thanks.
Framework for Generalized Multi-Protocol Label
Switching (GMPLS)-based Control of Synchronous Digital
Hierarchy/Synchronous Optical Networking (SDH/SONET) Networks
Generalized Multi-Protocol Label Switching (GMPLS) is a suite of
protocol extensions to MPLS to make it generally applicable, to
include, for example, control of non packet-based switching, and
particularly, optical switching. One consideration is to use GMPLS
protocols to upgrade the control plane of optical transport networks.
This document illustrates this process by describing those extensions
to GMPLS protocols that are aimed at controlling Synchronous Digital
Hierarchy (SDH) or Synchronous Optical Networking (SONET) networks.
SDH/SONET networks make good examples of this process for a variety
of reasons. This document highlights extensions to GMPLS-related
routing protocols to disseminate information needed in transport path
computation and network operations, together with (G)MPLS protocol
extensions required for the provisioning of transport circuits. New
capabilities that an GMPLS control plane would bring to SDH/SONET
networks, such as new restoration methods and multi-layer circuit
establishment, are also discussed.
Requirements for Generalized Multi-Protocol Label Switching (GMPLS)
Routing for the Automatically Switched Optical Network (ASON)
The Generalized Multi-Protocol Label Switching (GMPLS) suite of
protocols has been defined to control different switching
technologies as well as different applications. These include
support for requesting Time Division Multiplexing (TDM) connections
including Synchronous Optical Network (SONET)/Synchronous Digital
Hierarchy (SDH) and Optical Transport Networks (OTNs).
This document concentrates on the routing requirements placed on the
GMPLS suite of protocols in order to support the capabilities and
functionalities of an Automatically Switched Optical Network (ASON)
as defined by the ITU-T.
Link Management Protocol (LMP) Management Information Base (MIB)
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects for modeling the Link
Management Protocol (LMP).
Generalized Multi-Protocol Label Switching (GMPLS)
Signaling Extensions for G.709 Optical Transport Networks Control
This document is a companion to the Generalized Multi-Protocol Label
Switching (GMPLS) signaling documents. It describes the technology-
specific information needed to extend GMPLS signaling to control
Optical Transport Networks (OTN); it also includes the so-called
A Transport Network View of the Link Management Protocol (LMP)
The Link Management Protocol (LMP) has been developed as part of the
Generalized MPLS (GMPLS) protocol suite to manage Traffic Engineering
(TE) resources and links. The GMPLS control plane (routing and
signaling) uses TE links for establishing Label Switched Paths
(LSPs). This memo describes the relationship of the LMP procedures
to 'discovery' as defined in the International Telecommunication
Union (ITU-T), and ongoing ITU-T work. This document provides an
overview of LMP in the context of the ITU-T Automatically Switched
Optical Networks (ASON) and transport network terminology and relates
it to the ITU-T discovery work to promote a common understanding for
progressing the work of IETF and ITU-T.
A Lexicography for the Interpretation of Generalized Multiprotocol
Label Switching (GMPLS) Terminology within the Context of the
ITU-T's Automatically Switched Optical Network (ASON) Architecture
Generalized Multiprotocol Label Switching (GMPLS) has been developed
by the IETF to facilitate the establishment of Label Switched Paths
(LSPs) in a variety of data plane technologies and across several
architectural models. The ITU-T has specified an architecture for
the control of Automatically Switched Optical Networks (ASON).
This document provides a lexicography for the interpretation of GMPLS
terminology within the context of the ASON architecture.
It is important to note that GMPLS is applicable in a wider set of
contexts than just ASON. The definitions presented in this document
do not provide exclusive or complete interpretations of GMPLS
concepts. This document simply allows the GMPLS terms to be applied
within the ASON context.
Generalized Multi-Protocol Label Switching (GMPLS)
Recovery Functional Specification
This document presents a functional description of the protocol
extensions needed to support Generalized Multi-Protocol Label
Switching (GMPLS)-based recovery (i.e., protection and restoration).
Protocol specific formats and mechanisms will be described in
Recovery (Protection and Restoration) Terminology
for Generalized Multi-Protocol Label Switching (GMPLS)
This document defines a common terminology for Generalized Multi-
Protocol Label Switching (GMPLS)-based recovery mechanisms (i.e.,
protection and restoration). The terminology is independent of the
underlying transport technologies covered by GMPLS.
Analysis of Generalized Multi-Protocol Label Switching (GMPLS)-based
Recovery Mechanisms (including Protection and Restoration)
This document provides an analysis grid to evaluate, compare, and
contrast the Generalized Multi-Protocol Label Switching (GMPLS)
protocol suite capabilities with the recovery mechanisms currently
proposed at the IETF CCAMP Working Group. A detailed analysis of
each of the recovery phases is provided using the terminology defined
in RFC 4427. This document focuses on transport plane survivability
and recovery issues and not on control plane resilience and related
All IETF RFCs can be downloaded for free from http://www.ietf.org/rfc.html
The current work plan and progress status of the CCAMP working group can
be viewed at http://www.ietf.org/html.charters/ccamp-charter.html
The CCAMP working group welcomes questions and discussion about all of its
work from individuals or organisations. The CCAMP mailing list is open to
anyone. Details of subscription can be found on the CCAMP charter page.
Adrian Farrel and Kireeti Kompella
CCAMP working group chairs