This section describes how to create tunnel interfaces to implement communication between IPv4 networks over the tunnel established.
An IPv4 over IPv6 tunnel is established between tunnel interfaces on two devices. As such, you need to configure a tunnel interface on both devices. For an IPv4 over IPv6 tunnel interface, you must specify a protocol type, source IPv6 address/source interface, and destination IPv6 address/destination domain name.
The destination address configured for the tunnel interface is unreachable or is the address of the tunnel interface.
The status of the source interface configured for the tunnel interface is Down.
The IP address configured on the tunnel interface is invalid.
Perform the following steps on the devices at both ends of a tunnel:
The system view is displayed.
A tunnel interface is created, and the tunnel interface view is displayed.
The tunnel protocol is set to IPv4 over IPv6.
A source IPv6 address or source interface is specified for the tunnel interface.
You can only specify a loopback interface as the source interface for a tunnel interface. Likewise, you can only specify the IPv6 address of a loopback interface as the source IPv6 address for a tunnel interface.
Run the destination [ vpn-instance vpn-instance-name ] ipv6-address command to specify a destination IPv6 address for the tunnel.
The destination IPv6 address specified for the tunnel can only be the IPv6 address of the loopback interface on the peer end.
Run the dns resolve command to enable dynamic DNS resolution.
Run the destination [ vpn-instance vpn-instance-name ] domain domain-name command to specify a destination domain name for the tunnel.
In VPN scenarios, the VPN instance to which the peer device is bound must be specified.
An IPv4 address is configured for the tunnel interface.
The configuration is committed.