System Administration Guide: IP Services

Planning for Tunnels in the Network Topology

The IPv6 implementation supports a number of tunnel configurations to serve as transition mechanisms as your network migrates to a mix of IPv4 and IPv6. Tunnels enable isolated IPv6 networks to communicate. Because most of the Internet runs IPv4, IPv6 packets from your site need to travel across the Internet through tunnels to destination IPv6 networks.

Here are some major scenarios for using tunnels in the IPv6 network topology:

For procedures for configuring tunnels, refer to Tasks for Configuring Tunnels for IPv6 Support (Task Map). For conceptual information regarding tunnels, refer to IPv6 Tunnels.