A Mikro Tik Router OS protocol that creates an Ethernet tunnel between two routers on top of an IP connection.
TCP/IP is a protocol which is responsible for routing the data to a specific IP address and verifying its integrity. We use the term Modbus TCP/IP to refer to Modbus frames which are sent over an ethernet network using the TCP/IP protocol. Ethernet/IP is itself a protocol which uses TCP/IP for routing the data for which the integrity is crucial. It also uses other protocols such as UDP/IP for data which needs to be sent and received very fast (at the cost of a reduced integrity). Ethernet/IP is much more complex than that, however Ethernet over IP (EoIP) Tunneling is a MikroTik RouterOS protocol that creates an Ethernet tunnel between two routers on top of an IP connection. The EoIP tunnel may run over IPIP tunnel, PPTP tunnel or any other connection capable of transporting IP. When the bridging function of the router is enabled, all Ethernet traffic (all Ethernet protocols) will be bridged just as if there where a physical Ethernet interface and cable between the two routers (with bridging enabled). This protocol makes multiple network schemes possible. Ethernet/IP (Ethernet Industrial Protocol) is a network communication standard capable of handling large amounts of data at speeds of 10 Mbps or 100 Mbps, and at up to 1500 bytes per packet. The specification uses an open protocol at the application layer. It is especially popular for control applications.  1) EtherNet/IP is an application layer protocol that is transferred inside a TCP/IP Packet. That means that EtherNet/IP is simply the way data is organized in a TCP or UDP packet. For information on what TCP or UDP is get my Industrial Ethernet Book.  nov. 2012. Ethernet over IP (EoIP) Tunneling is a MikroTik RouterOS protocol that creates an Ethernet tunnel between two routers on top of an IP connection. The EoIP interface appears as an Ethernet interface. This protocol makes multiple network schemes possible. Transporting Ethernet frames within IP packets in order to link LANs or tunnel traffic in an IP network. Normally, IP packets ride over Ethernet frames; however, EOIP flips the process, placing layer 2 frames inside layer 3 packets. ethernet over ip. EtherNet/IP is an industrial Ethernet network that combines standard Ethernet technologies with the media-independent Common Industrial Protocol or CIP.. EtherNet/IP is one of the leading industrial Ethernet networks in the world and is widely used in a range from industries including factory, hybrid and process. In 2009, the JTA was terminated and EtherNet/IP became under the sole control of ODVA and its members. Today, EtherNet/IP is one of four networks that adapt CIP to an industrial network along with DeviceNet, ControlNet and CompoNet. All of these networks are managed by ODVA, Inc.. Definition: Ethernet is a protocol that controls the way data is transmitted over a local area network (LAN) . It uses wires (meaning it is not a wireless technology). The wires used for a LAN are mostly those headed by an RJ-45 jack, which is similar to the jack plugged into your telephone set, but twice as big.  The following article is written to clarify the confusion between Ethernet and Ethernet/IP. First, if you do not know what the link, network and application layers of the OSI model are, I suggest you read our earlier blogposts on communication protocol structure and on industrial protocols used in robotics. Ethernet : 
http://blog.robotiq.com/bid/52756/What-is-the-difference-between-Ethernet-IP-and-TCP-IP http://wiki.mikrotik.com/wiki/Manual:Interface/EoIP http://searchunifiedcommunications.techtarget.com/definition/Ethernet-IP http://www.rtaautomation.com/technologies/ethernetip/ http://www.youtube.com/watch?v=Sj8I7J3J0Ek https://en.wikipedia.org/wiki/EtherNet/IP http://voip.about.com/od/voipbasics/g/whatisEthernet.htm http://blog.robotiq.com/bid/40793/What-Are-The-Differences-Between-Ethernet-and-Ethernet-IP
what is ethernet over ip