Ospf Version 3 - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

OSPF Version 3

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As new neighbors are added to the network or existing neighbors lose connectivity, the
adjacencies in the topology map are modified accordingly through the exchange (or
absence) of LSAs. These LSAs advertise only the incremental changes in the network,
which helps minimize the amount of OSPF traffic on the network. The adjacencies are
shared and used to create the network topology in the topological database.
OSPFv3 is a modified version of OSPF that supports IP version 6 (IPv6) addressing.
OSPFv3 differs from OSPFv2 in the following ways:
All neighbor ID information is based on a 32-bit router ID.
The protocol runs per link rather than per subnet.
Router and network link-state advertisements (LSAs) do not carry prefix information.
Two new LSA types are included: link-LSA and intra-area-prefix-LSA.
Flooding scopes are as follows:
Link-local
Area
AS
Link-local addresses are used for all neighbor exchanges except virtual links.
Authentication is removed. The IPv6 authentication header relies on the IP layer.
The packet format has changed as follows:
Version number 2 is now version number 3.
The db option field has been expanded to 24 bits.
Authentication information has been removed.
Hello messages do not have address information.
Two new option bits are included:
Type 3 summary LSAs have been renamed inter-area-prefix-LSAs.
Type 4 summary LSAs have been renamed inter-area-router-LSAs.
Understanding OSPF Areas and Backbone Areas
Understanding OSPF Configurations
Example: Disabling OSPFv2 Compatibility with RFC 1583
R and V6 .
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