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DES-7200 Configuration Guide Chapter 5 OSPF
Configuration
5-1
5 OSPFv3 Configuration
OSPFV2 (RFC2328) runs under the IPv4. The RFC5340 describes OSPFV3, the
extension of OSPFv2 that provides support for IPv6 routes. This document briefly
describes the OSPFv3 protocol and its configuration.
Caution
Before learning this document, you must know the OSPFv2 protocol and
related configuration.
The OSPFv3 protocol extends the OSPFv2 protocol with the same operation
mechanisms and most configurations as the OSPFv2.
5.1 Overview
As an Interior Gateway Protocol (IGP), the OSPF runs among the layer 3 devices
in a same Autonomous System (AS).
Unlike a vector distance protocol, the OSPF is a link-state protocol. By
exchanging various types of link-state advertisements (LSAs) recording link state
between devices, it synchronizes link state information between devices and then
calculates OSPF route entries through the Dijkstra algorithm.
The OSPFv3 is described in the RFC5340 and supports the IPv6. This section
describes the different implementation than OSPFv2.
LSA Association Change
Interface Configuration
Router ID Configuration
Authentication Mechanism Configuration
5.1.1 LSA Association Change
Just as described above, the OSPF is a link-state protocol and its implementation
is based on LSAs. Through LSAs, we can know the topologies of networks and
address information. In contrast to the IPv4, the IPv6 uses a 128-bit IP address.
The design of LSAs is modified accordingly. The types of LSAs are described as
follows:
Router-LSAs (Type 1)