Routing Mechanisms

3) Distance Vector Versus Link State

A) Introduction

  1. OSPF - Open Shortest First Path Protocol

    • OSPF is Preferred IETF IGP

    • Myth: OSPF is hard to use

    • Evolved from IS-IS

    • Link State Protocol

  2. IS-IS - Intermediate System to Intermediate System Routing

    • IS-IS is used by InternetMCI because of better cisco implementation

    • IS-IS has multi-protocol spec,

    • IS-IS took OSPF changes back into IS-IS

Susan Hares, Merit