IANAtunnelType

• Base type Enumeration

The encapsulation method used by a tunnel. The value direct indicates that a packet is encapsulated directly within a normal IP header, with no intermediate header, and unicast to the remote tunnel endpoint (e.g., an RFC 2003 IP-in-IP tunnel, or an RFC 1933 IPv6-in-IPv4 tunnel). The value minimal indicates that a Minimal Forwarding Header (RFC 2004) is inserted between the outer header and the payload packet. The value UDP indicates that the payload packet is encapsulated within a normal UDP packet (e.g., RFC 1234). The values sixToFour, sixOverFour, and isatap indicates that an IPv6 packet is encapsulated directly within an IPv4 header, with no intermediate header, and unicast to the destination determined by the 6to4, 6over4, or ISATAP protocol. The remaining protocol-specific values indicate that a header of the protocol of that name is inserted between the outer header and the payload header. The IP Tunnel MIB [RFC4087] is designed to manage tunnels of any type over IPv4 and IPv6 networks; therefore, it already supports IP-in-IP tunnels. But in a DS-Lite scenario, the tunnel type is point-to-multipoint IP-in-IP tunnels. The direct(2) defined in the IP Tunnel MIB only supports point-to-point tunnels. So, it needs to define a new tunnel type for DS-Lite. The assignment policy for IANAtunnelType values is identical to the policy for assigning IANAifType values.