2.2.2 NAT-T UDP Encapsulation Modes

The Encapsulation Mode field is located in the SA payload, as specified in [RFC2407] section 4.5. Specification [RFC3947] introduces new encapsulation mode values for this field. For more information about an alternative set of these values, see section 3.2.4.1 and [DRAFT-NATT].

The following table lists the UDP-Encapsulated-Tunnel values.

UDP-Encapsulated-Tunnel	Revision
0xF003	[DRAFT-NATT]
0x0003	[RFC3947]

The following table lists the UDP-Encapsulated-Transport values.

UDP-Encapsulated-Transport	Revision
0xF004	[DRAFT-NATT]
0x0004	[RFC3947]