3.1 INTRODUCTION

In this chapter we discuss router implementations for both networks and systems. We look at the dual IP layer procedure and proceed into testing of both IPv6 and IPv4 compatible addresses. The next sections deal with static tunnels, automatic tunnels, default tunneling, and automatic tunnel combinations. We finally look at security with respect to these router implementations and demonstrate how to refine your operational issues to protect your organization against information thieves.

3.2 ROUTER IMPLEMENTATIONS

Bay Networks is responsible for their version of an IPv6 implementation. Their IPv6 software functionality includes: IPv6 forwarding as well as forwarding of source routed packets, IPv6 Neighbor Discovery, IPv6 ICMP, IPv6 Stateless Autoconfiguration, total Support of IPv4 to IPv6 transition Mechanisms, configured static IPv6 in IPv4 Tunnels, automatic IPv6 in IPv4 Tunnels, IPv6 in IPv6 Tunnels, path MTU Discovery, RIPng (Dynamic IPv6 routing using RIP), IPv6 Static Routes, IPv6 over PPP, and IPv6 traffic filtering.

Digital Equipment Corporation, in its version of IPv6 routing for Distributed Routing Software, is used on the RouteAbout family of access and central site routers in addition to the DECswitch 900 family of Ethernet and FDDI switches. The RouteAbout and DECswitch products can be employed by themselves, as part of the MultiStack hub system, or in the DEChub 900 Multiswitch chassis. Digital's IPv6 routing implementation handles ICMPv6, Neighbor Discovery, RIPv6, forwarding of IPv6 packets, PPP for IPv6, as well as Static and Automatic tunnels.

Ipsilon Networks, Inc. has an IPv6 router based on FreeBSD. This solution will...