Interior Gateway Protocol

As an Interior Gateway Protocol ( IGP) routing protocols are referred to, which are used within autonomous systems.

Unlike Exterior Gateway Protocols ( EGP) they are characterized by their special skills in dealing with complex network topologies. Also functions to traffic engineering such as OSPF -TE can be found.

The EGPs used usually follow on from the ensured by the IGPs infrastructure. Therefore, in the normal case for each network protocol EGP runs exactly parallel with exactly one IGP.

Variants

Depending on the topology of the network are nowadays mostly used:

  • OSPF
  • EIGRP
  • IS-IS

Due to their age or their simple structure rarely used:

  • RIP
  • IGRP

Norms and Standards

  • RFC 1074 The NSFNET Backbone SPF based Interior Gateway Protocol
  • RFC 3785 Use of Interior Gateway Protocol ( IGP) Metric as a second MPLS Traffic Engineering (TE ) Metric
  • RFC 3906 Calculating Interior Gateway Protocol ( IGP) Routes Over Traffic Engineering Tunnels
  • Routing protocol
Teletraffic engineering Enhanced Interior Gateway Routing Protocol Interior Gateway Routing Protocol
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