vrIpTunnelSepEncapType 1.3.6.1.4.1.562.2.4.1.100.6.18.2.12.1.1

There are two types of encapsulation techniques for IP tunnel, IP in IP (RFC 2003) and GRE over IP (RFC 1701). This attributes specifies the encapsulation type of the IP tunnel. It defaults to ipInIp. ipInIp: As defined in RFC 2003, it can be used to encapsulated IP and IP payload only. If IP is the only type of payload to be encapsulated by the tunnel, this type of encapsulation is recommended as it requires less processing and uses less bandwidth. greIp: As defined in RFC 1701, it can be used to encapsulate IP or IPX payload. To encapsulate IPX payload, this encapsulation type must be used.