Deploying IPv6 Networks [Electronic resources] نسخه متنی

Overview

This chapter covers IPv6 unicast connectivity within an enterprise or service provider network, and discusses available options, implementation scenarios, and deployment recommendations. The intent is to present this information as it applies to different parts of the network:

Hosts or Customer Edge (CE) routers

Access and backbone infrastructures

The concepts that are relevant in making a host operational in an IPv6 network are presented first. This section of the chapter reviews the mechanisms for providing hosts and CE routers with an IPv6 address, and introduces new concept such as prefix delegation, for providing name-resolution support and for some AAA (authentication, authorization and accounting) management.

Subsequent sections discuss the delivery of IPv6 unicast connectivity from a network perspective. The service deployment will most likely interact at some point with or over some segments with existing IPv4 infrastructures. In this interaction, there are three deployment approaches:

IPv6 only IPv6 is the only protocol running over a given link (physical or virtual).

Dual stack IPv4 and IPv6 run together over the same link (physical or virtual).

IPv6 at the edge only IPv6 is confined to sites located at the edges of an existing IPv4 core infrastructure that it has to traverse.

These three approaches define a framework for the service deployment strategy. The technological means to implement them are presented in the context of the two relevant layers of the network: access and backbone.