This section provides examples for interconnecting IPv6 networks over IPv4 networks through various tunnel modes based on varied networks and security requirements.
To configure an IPv6 over IPv4 manual tunnel, configure the source and destination IPv4 addresses of the tunnel on the devices at both ends of the tunnel. Hosts on different IPv6 networks can communicate with each other through the IPv6 over IPv4 tunnel.
To configure an IPv6 over IPv4 GRE tunnel, configure source and destination IPv4 addresses for the tunnel on the devices at both ends of the tunnel. GRE enhances tunnel security.
To configure a 6to4 tunnel, configure the source IPv4 address of the tunnel on the routers at both ends of the tunnel. Hosts on different IPv6 networks can communicate through the 6to4 tunnel.
This section provides an example for configuring the 6to4 tunnel for the hosts on 6to4 networks and IPv6 networks to communicate. Configuring the 6to4 relay router is the same as configuring the 6to4 router. However, to ensure the communication between the hosts on the 6to4 network and IPv6 network, you need to configure static routes to the IPv6 network on the 6to4 router.
This section provides an example for configuring a 6RD tunnel by manually setting the source IPv4 address of the tunnel on the 6RD Customer Edge (CE) device. Then hosts on the IPv6 networks can communicate through the 6RD tunnel.
This section provides an example for configuring 6RD tunnels between 6RD Customer Edge (CE) devices and 6RD Border Relay (BR) devices on the borders of IPv6 networks and IPv4 networks. Then hosts on the IPv6 networks can communicate over the 6RD tunnels.
To establish an ISATAP tunnel between a border device and host, configure a source IPv4 address for the tunnel on the border device and host. Therefore, the host can obtain an IPv6 address through the border device, and hosts on different IPv6 networks can communicate.