Intradomain routing protocols

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Intradomain routing protocols support one of the two planses, control and forwarding, are needed to deliver IP packets over a network. Intradomain routing protocols provide information to the control plane, which determines and chooses the path to a destination based on metrics such as number of hops, delay, and bandwidth. The forwarding process does the actual insertion of the IP packet into a frame and forwards the frame to the next hop.

The major intradomain routing protocols in current use are:

• Routing Information Protocol (RIP)
• Open Shortest Path First (OSPF)
• Intermediate System-Intermediate System (IS-IS)
• Enhanced Interior Gateway Routing Protocol (EIGRP)

Of these protocols, the first three are open standards from the Internet Engineering Task Force, while EIGRP is a proprietary protocol of Cisco Systems.