"Procedures for Dynamically Signaled Hierarchical Label Switched Paths", Kohei Shiomoto, Adrian Farrel, Richard Rabbat, Arthi Ayyangar, Zafar Ali, 17-Oct-08. ( bytes)

Label Switched Paths (LSPs) set up in Multiprotocol Label Switching (MPLS) or Generalized MPLS (GMPLS) networks can be used to form links for carrying traffic in those networks or in other (client) networks. Protocol extensions already exist to facilitate the establishment of an LSP as a numbered traffic engineering (TE) link within the same instance of the routing as is used to advertise the links that it traverses creating a Forwarding Adjacency (FA). This document extends those mechanisms to support unnumbered FAs. This document also defines how to indicate that an LSP should be advertised as a link in another instance of the routing protocol (for instance in a client network) and which instance to use. Furthermore, mechanisms are defined to indicate when an LSP is to be used as a component link of a TE link bundle and to identify the bundle.

"Ethernet Traffic Parameters", Dimitri Papadimitriou, Intellectual Property, 1-Nov-08. ( bytes)

This document describes the Metro Ethernet Forum (MEF) - specific Ethernet Traffic Parameters as described in MEF10.1 when using Generalized Multi-Protocol Label Switching (GMPLS) Resource ReSerVation Protocol - Traffic Engineering (RSVP-TE) signaling.

"OSPFv2 Routing Protocols Extensions for ASON Routing", Dimitri Papadimitriou, Intellectual Property, 29-Oct-08. ( bytes)

The ITU-T has defined an architecture and requirements for operating an Automatically Switched Optical Network (ASON). The Generalized Multiprotocol Label Switching (GMPLS) protocol suite is designed to provide a control plane for a range of network technologies including optical networks such as time division multiplexing (TDM) networks including SONET/SDH and Optical Transport Networks (OTNs), and lambda switching optical networks. The requirements for GMPLS routing to satisfy the requirements of ASON routing, and an evaluation of existing GMPLS routing protocols are provided in other documents. This document defines to the OSPFv2 Link State Routing Protocol to meet the routing requirements for routing in an ASON. D.Papadimitriou et al. - Expires April 2009 [page 1] draft-ietf-ccamp-gmpls-ason-routing-ospf-06.txt October 2008 Note that this work is scoped to the requirements and evaluation expressed in RFC 4258 and RFC 4652 and the ITU-T Recommendations current when those documents were written. Future extensions of revisions of this work may be necessary if the ITU-T Recommendations are revised or if new requirements are introduced into a revision of RFC 4258.

"Graceful Shutdown in MPLS and Generalized MPLS Traffic Engineering Networks", Zafar Ali, JP Vasseur, Anca Zamfir, Jonathan Newton, 29-Oct-08. ( bytes)

MPLS-TE Graceful Shutdown is a method for explicitly notifying the nodes in a Traffic Engineering (TE) enabled network that the TE capability on a link or on an entire Label Switching Router (LSR) is going to be disabled. MPLS-TE graceful shutdown mechanisms are tailored toward addressing planned outage in the network. This document provides requirements and protocol mechanisms to reduce/eliminate traffic disruption in the event of a planned shutdown of a network resource. These operations are equally applicable to both MPLS and its Generalized MPLS (GMPLS) extensions. Ali et al. Expires April 2009 [page 1] draft-ietf-ccamp-mpls-graceful-shutdown-08.txt

"Operating Virtual Concatenation (VCAT) and the Link Capacity Adjustment Scheme (LCAS) with Generalized Multi-Protocol Label Switching (GMPLS)", Greg Bernstein, 18-Nov-08. ( bytes)

This document describes requirements for, and use of, the Generalized Multi-Protocol Label Switching (GMPLS) control plane in conjunction with the Virtual Concatenation (VCAT) layer 1 inverse multiplexing mechanism and its companion Link Capacity Adjustment Scheme (LCAS) which can be used for hitless dynamic resizing of the inverse multiplex group. These techniques apply to Optical Transport Network (OTN), Synchronous Optical Network (SONET), Synchronous Digital Hierarchy (SDH), and Plesiochronous Digital Hierarchy (PDH) signals.

"Traffic Engineering Database Management Information Base in support of MPLS-TE/GMPLS", Thomas Nadeau, 4-Aug-08. ( bytes)

This memo defines the Management Information Base (MIB) objects in order to manage traffic engineering database (TED) information with extension in support of Multi-Protocol Label Switching (MPLS) with traffic engineering (TE) as well as Generalized MPLS (GMPLS) for use with network management protocols.

"draft-ietf-ccamp-pc-and-sc-reqs-06.txt", Diego Caviglia, Dino Bramanti, Dan Li, Dave McDysan, 15-Sep-08. ( bytes)

From a Carrier perspective, the possibility of turning a Permanent Connection (PC) into a Soft Permanent Connection (SPC) and vice versa, without actually affecting Data Plane traffic being carried over it, is a valuable option. In other terms, such operation can be seen as a way of transferring the ownership and control of an existing and in-use Data Plane connection between the Management Plane and the Control Plane, leaving its Data Plane state untouched. This memo sets out the requirements for such procedures within a Generalized Multiprotocol Label Switching (GMPLS) network.

"OSPF Extensions in Support of Inter-AS Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering", Mach Chen, Renhai Zhang, 27-Jul-08. ( bytes)

This document describes extensions to the OSPF version 2 and 3 protocols to support Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) for multiple Autonomous Systems (ASes). OSPF-TE v2 and v3 extensions are defined for the flooding of TE information about inter-AS links which can be used to perform inter-AS TE path computation. No support for flooding information from within one AS to another AS is proposed or defined in this document.

"Description of the RSVP-TE Graceful Restart Procedures", Dan Li, 19-May-08. ( bytes)

The Hello message for the Resource Reservation Protocol (RSVP) has been defined to establish and maintain basic signaling node adjacencies for Label Switching Routers (LSRs) participating in a Multiprotocol Label Switching (MPLS) traffic engineered (TE) network. The Hello message has been extended for use in Generalized MPLS (GMPLS) network for state recovery of control channel or nodal faults.

"Generalized Multi-Protocol Label Switching (GMPLS) Protocol Extensions for Multi-Layer and Multi-Region Networks (MLN/MRN)", Dimitri Papadimitriou, Martin Vigoureux, Kohei Shiomoto, Deborah Brungard, Jean-Louis Roux, Eiji Oki, Ichiro Inoue, Emmanuel Dotaro, Gert Grammel, 3-Nov-08. ( bytes)

There are requirements for the support of networks comprising LSRs with different data plane switching layers controlled by a single Generalized Multi Protocol Label Switching (GMPLS) control plane instance, referred to as GMPLS Multi-Layer Networks/Multi-Region Networks (MLN/MRN). This document defines extensions to GMPLS routing and signaling protocols so as to support the operation of GMPLS Multi-Layer/Multi- Region Networks. It covers the elements of a single GMPLS control plane instance controlling multiple LSP regions or layers within a single TE domain.

"ISIS Extensions in Support of Inter-AS Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering", Mach Chen, Renhai Zhang, 4-Sep-08. ( bytes)

This document describes extensions to the ISIS (ISIS) protocol to support Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) for multiple Autonomous Systems (ASes). It defines ISIS-TE extensions for the flooding of TE information about inter-AS links which can be used to perform inter- AS TE path computation. No support for flooding information from within one AS to another AS is proposed or defined in this document.

"GMPLS Ethernet Label Switching Architecture and Framework", Don Fedyk, Lou Berger, Loa Andersson, 27-Oct-08. ( bytes)

There has been significant recent work in increasing the capabilities of Ethernet switches and Ethernet forwarding models. As a consequence, the role of Ethernet is rapidly expanding into "transport networks" that previously were the domain of other technologies such as SONET/SDH TDM and ATM. This document defines an architecture and framework for a GMPLS based control plane for Ethernet in this "transport network" capacity. GMPLS has already been specified for similar technologies. Some additional extensions to the GMPLS control plane are needed and this document provides a framework for these extensions.Contents

"Encoding of Attributes for Multiprotocol Label Switching (MPLS) Label Switched Path (LSP) Establishment Using RSVP-TE", Adrian Farrel, Dimitri Papadimitriou, JP Vasseur, Arthi Ayyangar, 27-May-08. ( bytes)

Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs) may be established using the Resource Reservation Protocol Traffic Engineering (RSVP-TE) extensions. This protocol includes an object (the SESSION_ATTRIBUTE object) that carries a Flags field used to indicate options and attributes of the LSP. That Flags field has eight bits allowing for eight options to be set. Recent proposals in many documents that extend RSVP-TE have suggested uses for each of the previously unused bits. This document defines a new object for RSVP-TE messages that allows the signaling of further attribute bits and also the carriage of arbitrary attribute parameters to make RSVP-TE easily extensible to support new requirements. Additionally, this document defines a way to record the attributes applied to the LSP on a hop-by-hop basis.

"GMPLS Asymmetric Bandwidth Bidirectional Label Switched Paths (LSPs)", Lou Berger, Attila Takacs, Diego Caviglia, Don Fedyk, Julien Meuric, 17-Nov-08. ( bytes)

This document defines a method for the support of GMPLS Asymmetric Bandwidth Bidirectional Label Switched Paths (LSPs). The presented approach is applicable to any switching technology and builds on the original RSVP model for the transport of traffic related parameters. The procedures described in this document are experimental.

"Label Switched Path (LSP) Dynamic Provisioning Performance Metrics in Generalized MPLS Networks", Weiqiang Sun, Guoying Zhang, Jianhua Gao, Guowu Xie, Rajiv Papneja, Bin Gu, Xueqing Wei, 24-Jun-08. ( bytes)

Generalized Multi-Protocol Label Switching (GMPLS) is one of the most promising candidate technologies for future data transmission network. GMPLS has been developed to control and operate different kinds of network elements, such as conventional routers, switches, Dense Wavelength Division Multiplexing (DWDM) systems, Add- Drop Multiplexors (ADMs), photonic cross-connects (PXCs), optical cross- connects (OXCs), etc. Dynamic provisioning ability of these physically diverse devices differs from each other drastically. At the same time, the need for Dynamicly provisioned connections is increasing because optical networks are being deployed in metro areas. As different applications have varied requirements in the provisioning performance of optical networks, it is imperative to define standardized metrics and procedures such that the performance of networks and application needs can be mapped to each other. This document provides a series of performance metrics to evaluate the dynamic LSP provisioning performance in GMPLS networks, specifically the Dynamic LSP setup/release performance. These metrics can depict the features of GMPLS networks in LSP dynamic provisioning. They can also be used in operational networks for carriers to monitor the control plane performance in realtime.

"Data Channel Status Confirmation Extensions for the Link Management Protocol", Dan Li, Huiying Xu, Fatai Zhang, Snigdho Bardalai, Julien Meuric, Diego Caviglia, 2-Nov-08. ( bytes)

This document defines simple additions to the Link Management Protocol (LMP) to provide a control plane tool that can assist in the location of stranded resources by allowing adjacent LSRs to confirm data channel statuses, and provides triggers for notifying the management plane if any discrepancies are found.

"RSVP Extensions for Path Key Support", Richard Bradford, JP Vasseur, Adrian Farrel, 1-Nov-08. ( bytes)

The paths taken by Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) Label Switched Paths (LSPs) may be computed by Path Computation Elements (PCEs). Where the TE LSP crosses multiple domains, such as Autonomous Systems (ASes), the path may be computed by multiple PCEs that cooperate, with each responsible for computing a segment of the path. To preserve confidentiality of topology within each AS, the PCEs support a mechanism to hide the contents of a segment of a path (such as the segment of the path that traverses an AS), called the Confidential Path Segment (CPS), by encoding the contents as a Path Key Subobject (PKS) and embedding this subobject within the result of its path computation. This document describes how to carry Path Key Subobjects in the Resource Reservation Protocol (RSVP) Explicit Route Objects (EROs) and Record Route Object (RROs) so as to facilitate confidentiality in the signaling of inter-domain TE LSPs.

"draft-ietf-ccamp-pc-spc-rsvpte-ext-02.txt", Diego Caviglia, Daniele Ceccarelli, Dino Bramanti, Dan Li, Snigdho Bardalai, 31-Oct-08. ( bytes)

We would like to dedicate this work to our friend and colleague Dino Bramanti, who passed away at the early age of 38. Dino has been involved in this work since its beginning. In a transport network scenario, where Data Plane connections controlled either by GMPLS Control Plane (Soft Permanent Connections - SPC) or by Management System (Permanent Connections - PC) may independently coexist, the ability of transforming an existing PC into a SPC and vice versa - without actually affecting Data Plane traffic being carried over it - is a requirement. See draft "draft-ietf-ccamp-pc-and-reqs-04.txt [1]. This memo provides a minor extension to RSVP-TE [RFC2205], [RFC3471], [RFC3473], [RFC4872] signaling protocol, within GMPLS architecture, to enable such connection ownership transfer and describes the proposed procedures. Failure conductions and subsequent roll back are also illustrated taking into account that an handover failure must not impact the already established data plane connections.

"GMPLS control of Ethernet PBB-TE", Don Fedyk, David Allan, Himanshu Shah, Nabil Bitar, Attila Takacs, Diego Caviglia, Alan McGuire, Nurit Sprecher, Lou Berger, 13-Jul-08. ( bytes)

This specification is complementary to the GMPLS controlled Ethernet architecture document [ARCH] and describes the technology specific aspects of GMPLS control for Provider Backbone Bridging Traffic Engineering (PBB-TE) [IEEE 802.1Qay]. The necessary GMPLS extensions and mechanisms are described to establish Ethernet PBB-TE point to point (P2P) and point to multipoint (P2MP) connections. This document supports, but does not modify, the standard IEEE data plane.

"Generalized MPLS (GMPLS) Support For Metro Ethernet Forum and G.8011 Ethernet Service Switching", Lou Berger, Don Fedyk, 8-Aug-08. ( bytes)

This document describes a method for controlling two specific types of Ethernet switching via Generalized Multi-Protocol Label Switching (GMPLS). This document supports the types of switching implied by the Ethernet services that have been defined in the context of the Metro Ethernet Forum (MEF) and International Telecommunication Union (ITU) G.8011. Specifically, switching in support of Ethernet private line service and Ethernet virtual private line service. Support for MEF and ITU defined parameters are also covered. Some of the extensions defined in this document are generic in nature and not specific to Ethernet.

"Generalized MPLS (GMPLS) Support For Metro Ethernet Forum and G.8011 User-Network Interface (UNI)", Lou Berger, Don Fedyk, 8-Aug-08. ( bytes)

This document describes a method for controlling two specific types of Ethernet switching via a Generalized Multi-Protocol Label Switching (GMPLS) based User-Network Interface (UNI). This document supports the types of switching required to implied by the Ethernet services that have been defined in the context of the Metro Ethernet Forum (MEF) and International Telecommunication Union (ITU) G.8011. This document is the UNI companion to "Generalized MPLS (GMPLS) Support For Metro Ethernet Forum and G.8011 Ethernet Service Switching". This document does not define or limit the underlying intra-domain or Internal NNI (I-NNI) technology used to support the UNI.

"Framework for GMPLS and PCE Control of Wavelength Switched Optical Networks (WSON)", Greg Bernstein, 31-Oct-08. ( bytes)

This memo provides a framework for applying Generalized Multi- Protocol Label Switching (GMPLS) and the Path Computation Element (PCE) architecture to the control of wavelength switched optical networks (WSON). In particular we provide control plane models for key wavelength switched optical network subsystems and processes. The subsystems include wavelength division multiplexed links, tunable laser transmitters, reconfigurable optical add/drop multiplexers (ROADM) and wavelength converters. Lightpath provisioning, in general, requires the routing and wavelength assignment (RWA) process. This process is reviewed and the information requirements, both static and dynamic for this process are presented, along with alternative implementation scenarios that could be realized via GMPLS/PCE and/or extended GMPLS/PCE protocols. This memo does NOT address optical impairments in any depth and focuses on topological elements and path selection constraints that are common across different WSON environments. It is expected that a variety of different techniques will be applied to optical impairments depending on the type of WSON, such as access, metro or long haul.

"Generalized Labels for G.694 Lambda-Switching Capable Label Switching Routers", Tomohiro Otani, Hongxiang Guo, Keiji Miyazaki, Diego Caviglia, 14-Jul-08. ( bytes)

Technology in the optical domain is constantly evolving and as a consequence new equipment providing lambda switching capability has been developed and is currently being deployed. However, RFC 3471 has defined that a wavelength label (section 3.2.1.1) "only has significance between two neighbors" and global wavelength continuity is not considered. In order to achieve interoperability in a network composed of next generation lambda switch-capable equipment, this document defines a standard lambda label format, being compliant with ITU-T G.694. Moreover some consideration on how to ensure lambda continuity with RSVP-TE is provided. This document is a companion to the Generalized Multi-Protocol Label Switching (GMPLS) signaling. It defines the label format when Lambda Switching is requested in an all optical network.

"Service Provider Requirements for Ethernet control with GMPLS", Wataru Imajuku, Yoshiaki Sone, Muneyoshi Suzuki, Kazuhiro Matsuda, Nabil Bitar, 11-Jun-08. ( bytes)

Generalized Multi-Protocol Label Switching (GMPLS) is applicable to Ethernet switches supporting Provider Backbone Bridge Traffic Engineering (PBB-TE) networks. The GMPLS controlled Ethernet label switch network not only automates creation of Ethernet Label Switched Paths(Eth-LSPs), it also provides sophisticated Eth-LSP recovery Mechanisms such as protection and restoration of an Eth-LSP. This document describes the requirements for the set of solutions of GMPLS controlled Ethernet label switch networks.

"Generalized MPLS (GMPLS) Data Channel Switching Capable (DCSC) and Channel Set Label Extensions", Lou Berger, Don Fedyk, 8-Aug-08. ( bytes)

This document describes two technology independent extensions to Generalized Multi-Protocol Label Switching. The first extension defines the new switching type Data Channel Switching Capable. Data Channel Switching Capable interfaces are able to support switching of the whole digital channel presented on single channel interfaces. The second extension defines a new type of generalized label and updates related objects. The new label is called the Generalized Channel_Set Label and allows more than one data plane label to be controlled as part of an LSP.

"Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", Greg Bernstein, 3-Nov-08. ( bytes)

This document provides a model of information needed by the routing and wavelength assignment (RWA) process in wavelength switched optical networks (WSONs). The purpose of the information described in this model is to facilitate constrained lightpath computation in WSONs, particularly in cases where there are no or a limited number of wavelength converters available. This model currently does not include optical impairments.

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