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MPLS can exist in both an IPv4 and an IPv6 environment, using appropriate routing protocols. The major goal of MPLS development was the increase of routing speed. [ 37 ] This goal is no longer relevant [ 38 ] because of the usage of newer switching methods such as ASIC , TCAM and CAM -based switching able to forward plain IPv4 as fast as MPLS ...
As of February 2003, the Internet Engineering Task Force (IETF) MPLS working group deprecated Constraint-based Routing Label Distribution Protocol (CR-LDP) and decided to focus purely on RSVP-TE. [2] Operational overhead of RSVP-TE compared to the more widely deployed Label Distribution Protocol (LDP) will generally be higher.
The Label Distribution Protocol (LDP) is a protocol defined by the IETF (RFC 5036) for the purpose of distributing labels in an MPLS environment. LDP relies on the underlying routing information provided by an IGP in order to forward label packets.
Fast Reroute is a MPLS (Multiprotocol Label Switching) and IP resiliency technology to provide fast traffic recovery upon link or router failures for mission critical services. [1] Upon any single link or node failures, it could be able to recover impacted traffic flows in the level of 50 ms.
VRFs were initially introduced in combination with Multiprotocol Label Switching (MPLS), but VRF proved to be so useful that it eventually evolved to live independent of MPLS. This is the historical explanation of the term VRF Lite: usage of VRFs without MPLS. Example of a global and VRF Routing table summary with different routes/routing protocol
Source Demand Routing Protocol: RFC 1940: 0x2B 43 IPv6-Route Routing Header for IPv6: RFC 8200: 0x2C 44 IPv6-Frag Fragment Header for IPv6: RFC 8200: 0x2D 45 IDRP Inter-Domain Routing Protocol: 0x2E 46 RSVP Resource Reservation Protocol: RFC 2205: 0x2F 47 GRE Generic Routing Encapsulation: RFC 2784, RFC 2890: 0x30 48 DSR Dynamic Source Routing ...
Generalized Multi-Protocol Label Switching (GMPLS) [1] 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.
MPLS Fast Reroute (also called MPLS local restoration or MPLS local protection) is a local restoration network resiliency mechanism. It is actually a feature of resource reservation protocol (RSVP) traffic engineering ( RSVP-TE ).