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Interoperation Configuration Guide

AR Router

This document provides cases for connecting AR enterprise routers to devices of other vendors.

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Overview

Overview

The Open Shortest Path First (OSPF) protocol is a link-state Interior Gateway Protocol (IGP) developed by the Internet Engineering Task Force (IETF). OSPF Version 2 is designed for IPv4.

Prior to the emergence of OSPF, the Routing Information Protocol (RIP) was the most widely used IGP. RIP is a distance-vector routing protocol. Due to RIP's slow convergence, routing loops, and poor scalability, OSPF is now the most widely accepted and used IGP.

OSPF is a link-state routing protocol featuring:

  • Multicast sending and receiving to reduce load on routers that are not running OSPF.
  • Classless Inter-Domain Routing (CIDR).
  • Load balancing among equal-cost routes.
  • Packet encryption.

OSPF supports the following network types. This example describes the interconnection on a broadcast network, and subsequent examples will describe the interconnection on other three network types.

  • Broadcast network.
  • Point-to-point (P2P) network.
  • Non-Broadcast Multi-Access (NBMA) network.
  • Point to Multipoint (P2MP) network.
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Updated: 2019-05-17

Document ID: EDOC1100034005

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