Since IPv4 VPN puts the remote host on a private network, the natural choice for the IPv6 tunnel is the ISATAP (Intra-Site Automatic Tunnel Addressing Protocol), which is suitable for communication within a location. However, in practice, we can use any type of IPv6 tunnel as long as it is supported by the host and while the gateway is set up within the private network for it. Configurations for IPv4 access to VPN and IPv6 tunnel are completely independent. From the host's perspective, the tunnel configuration depends on the operating system used. …show more content…
IPv6 IPsec can be used for protection and control levels and data levels between two routers.
Cisco IOS software also offers a mechanism for protecting transmitted data between two routers using a new tunnel type that uses IPv6 IPsec. IKEv1 is used to manage the key. Figure 5.3 shows the topology in which this option is used between two routers A and