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'''Generalized Multi-Protocol Label Switching''' ('''GMPLS''')<ref>E. Mannie, "Generalized Multi-Protocol Label Switching (GMPLS) architecture", RFC 3945, Oct. 2004, IETF.</ref> is a protocol suite extending [[MPLS]] to manage further classes of interfaces and switching technologies other than packet interfaces and switching, such as [[time-division multiplexing]], layer-2 switching, wavelength switching and fiber-switching.
==Differences between MPLS and GMPLS==
Generalized MPLS differs from traditional MPLS<ref>GMPLS RFC 3945 "1.2. Multiple Types of Switching and Forwarding Hierarchies"</ref> in that it extends support to multiple types of switching such as TDM, wavelength and fiber (port) switching. For instance, GMPLS is the ''[[de facto]]'' control plane of [[wavelength switched optical network]] (WSON).<ref>{{cite journal | last1 = Bernstein | first1 = G. M. | last2 = Lee | first2 = Y. | last3 = Galver | first3 = A. | last4 = Martensson | first4 = J. | year = 2009 | title = Modeling WDM wavelength switching systems for use in GMPLS and automated path computation
These changes and additions impact basic [[label-switched path]] (LSP) properties: how labels are requested and communicated, the unidirectional nature of LSPs, how errors are propagated, and information provided for synchronizing the ingress and egress LSRs.
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[[Category:Internet Standards]]
[[Category:Network protocols]]
[[Category:Telecommunication protocols]]
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