Evaluation of Existing GMPLS Protocols against Multi-Layer and Multi-Region Networks (MLN/MRN)
RFC 5339
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RFC - Informational
(September 2008; Errata)
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2015-10-14
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IETF
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RFC 5339 (Informational)
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Ross Callon
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Network Working Group JL. Le Roux, Ed.
Request for Comments: 5339 France Telecom
Category: Informational D. Papadimitriou, Ed.
Alcatel-Lucent
September 2008
Evaluation of Existing GMPLS Protocols
against Multi-Layer and Multi-Region Networks (MLN/MRN)
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Abstract
This document provides an evaluation of Generalized Multiprotocol
Label Switching (GMPLS) protocols and mechanisms against the
requirements for Multi-Layer Networks (MLNs) and Multi-Region
Networks (MRNs). In addition, this document identifies areas where
additional protocol extensions or procedures are needed to satisfy
these requirements, and provides guidelines for potential extensions.
Le Roux & Papadimitriou Informational [Page 1]
RFC 5339 Evaluation of GMPLS against MLN/MRN Reqs September 2008
Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................4
2. MLN/MRN Requirements Overview ...................................4
3. Analysis ........................................................5
3.1. Aspects of Multi-Layer Networks ............................5
3.1.1. Support for Virtual Network Topology
Reconfiguration .....................................5
3.1.1.1. Control of FA-LSPs Setup/Release ...........5
3.1.1.2. Virtual TE Links ...........................6
3.1.1.3. Traffic Disruption Minimization
during FA Release ..........................8
3.1.1.4. Stability ..................................8
3.1.2. Support for FA-LSP Attribute Inheritance ............9
3.1.3. FA-LSP Connectivity Verification ....................9
3.1.4. Scalability .........................................9
3.1.5. Operations and Management of the MLN/MRN ...........10
3.1.5.1. MIB Modules ...............................10
3.1.5.2. OAM .......................................11
3.2. Specific Aspects of Multi-Region Networks .................12
3.2.1. Support for Multi-Region Signaling .................12
3.2.2. Advertisement of Adjustment Capacities .............13
4. Evaluation Conclusion ..........................................16
4.1. Traceability of Requirements ..............................16
5. Security Considerations ........................................20
6. Acknowledgments ................................................20
7. References .....................................................21
7.1. Normative References ......................................21
7.2. Informative References ....................................21
8. Contributors' Addresses ........................................23
Le Roux & Papadimitriou Informational [Page 2]
RFC 5339 Evaluation of GMPLS against MLN/MRN Reqs September 2008
1. Introduction
Generalized MPLS (GMPLS) extends MPLS to handle multiple switching
technologies: packet switching, layer-2 switching, TDM (Time Division
Multiplexing) switching, wavelength switching, and fiber switching
(see [RFC3945]). The Interface Switching Capability (ISC) concept is
introduced for these switching technologies and is designated as
follows: PSC (Packet Switch Capable), L2SC (Layer-2 Switch Capable),
TDM capable, LSC (Lambda Switch Capable), and FSC (Fiber Switch
Capable). The representation, in a GMPLS control plane, of a
switching technology domain is referred to as a region [RFC4206]. A
switching type describes the ability of a node to forward data of a
particular data plane technology, and uniquely identifies a network
region.
A data plane switching layer describes a data plane switching
granularity level. For example, LSC, TDM VC-11 and TDM VC-4-64c are
three different layers. [RFC5212] defines a Multi-Layer Network
(MLN) to be a Traffic Engineering (TE) domain comprising multiple
data plane switching layers either of the same ISC (e.g., TDM) or
different ISC (e.g., TDM and PSC) and controlled by a single GMPLS
control plane instance. [RFC5212] further defines a particular case
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