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GMPLS differs from MPLS as it supports multiple types of switching. In particular, GMPLS offers the additional support for [[TDM]], wavelength, and fiber switching''<ref>L. Berger, "Generalized Multi-Protocol Label Switching (GMPLS) Signaling Functional Description", RFC 3471, Jan. 2003, IETF.</ref>
This architecture clearly separates the control plane and the forwarding plane. In addition, it also clearly separates the control plane in two parts, the signaling plane containing the signaling protocols and the routing plane containing the routing protocols. <ref>RFC 3945</ref>
==How GMPLS works==
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