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  1. 1. GMPLS: Generalized Multiprotocol Label SwitchingGeneralized Multiprotocol Label Switching (GMPLS) enhances MPLS architecture by thecomplete separation of the control and data planes (See Connectionless NetworkProtocol —CLNP) of various networking layers. GMPLS enables a seamlessinterconnection and convergence of new and legacy networks by allowing end-to-endprovisioning, control and traffic engineering even when the start and the end nodesbelong to heterogeneous networks.GMPLS is based on the IP routing and addressing models. This assumes that IPv4and/or IPv6 addresses are used to identify interfaces but also that traditional(distributed) IP routing protocols are reused. The common control plane promises tosimplify network operation and management by automating end-to-end provisioning ofconnections, managing network resources, and providing the level of QoS that isexpected in the new applications.While the technology used by the GMPLS control plane remains IP-based, the dataplane (traffic plane) can now diversify to include more varieties of traffic (TDM,Lambda, packet, and fiber, etc). Generalized MPLS (GMPLS) supports multiple types ofswitching, i.e., the addition of support for TDM, lambda, and fiber (port) switching. Insummary, GMPLS extends MPLS functionality by establishing and provisioning pathsfor: • TDM paths, where time slots are the labels (SONET). • FDM paths, where electromagnetic frequency is the label (light waves). • Space division multiplexed paths, where the label indicates the physical position of data (Photonic Cross-connect).GMPLS is based on the Traffic Engineering (TE) extensions to MPLS (MPLS-TE). Thebiggest addition in the GMPLS protocol suite is a new signaling protocol, LinkManagement Protocol (LMP), to establish, release and manage connections betweentwo adjacent GMPLS-capable nodes. Other protocols RSVP-TE, OSPF-TE, CR-LDP andIS-IS-TE, where OSPF-TE and IS-IS-TE are extended from the original protocols forGMPLS, are used in the GMPLS architecture. 1
  2. 2. Network Monitoring andTroubleshootingEasy to use tool with comprehensivefeatures at a fraction of the cost ofothers.Click here for free demo.Technical books, quick guidesand postersNetworking, telecom, computing,wireless, information technologies,security and much more ...Click here for details.Protocol Structure - Generalized Multiprotocol Label Switching (MPLS)GMPLS Protocol Suite OverviewProtocols Description 2
  3. 3. Routing OSPF - TE, IS Routing protocols for the auto-discovery of network - IS - TE topology, advertise resource availability.Signaling RSVP - TE, Signaling protocols for the establishment of traffic- CR - LDP engineered LSPs.Link LMP • Control-Channel ManagementManagement • Link-Connectivity Verification • Link-Property Correlation • Fault IsolationRelated ProtocolsLDP , CR-LDP , RSVP-TE , IP , ATM ,RSVP , OSPF , BGP , IS-IS , MPLSSponsor SourceGMPLS architecture arc is defined by IETF ( ) RFC 3945.Reference : GMPLS Charter : Multiprotocol Label SwitchingArchitecture Generalized Multi-Protocol LabelSwitching (GMPLS) Architecture 3