Generalized multiprotocol label switching: An overview of signaling enhancements and recovery techniques

Citation
A. Banerjee et al., Generalized multiprotocol label switching: An overview of signaling enhancements and recovery techniques, IEEE COMM M, 39(7), 2001, pp. 144-151
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Information Tecnology & Communication Systems
Journal title
IEEE COMMUNICATIONS MAGAZINE
ISSN journal
0163-6804 → ACNP
Volume
39
Issue
7
Year of publication
2001
Pages
144 - 151
Database
ISI
SICI code
0163-6804(200107)39:7<144:GMLSAO>2.0.ZU;2-D
Abstract
Generalized multiprotocol label switching, also referred to as multiprotoco l lambda switching, is a multipurpose control plane paradigm that supports not only devices that perform packet switching, but also devices that perfo rm switching in the time, wavelength, and space domains. The development of GMPLS necessitates enhancements to existing IP signaling and routing proto cols. An overview of the Mp lambdaS concept was presented in Il], and a sum mary of the extensions to IP routing protocols (OSPF [2] and IS-IS [3]) and the new Link Management Protocol to support GMPLS were presented in a comp anion paper in the January issue of this magazine [4]. In this article we p resent enhancements to two commonly used IP signaling protocols, RSVP and L DP, to support GMPLS. We illustrate the concept of hierarchical label switc hed path setup with an example, discuss mechanisms for bidirectional LSP se tup, and describe the applications of suggested labels. We also discuss the important problem of protection and restoration in the GMPLS context. Fina lly, we describe how various recovery mechanisms can be implemented within the GMPLS framework.