Do you know how much is the overhead of EoIP?
Mikrotik Wiki says:
In MTCRE Training, the trainer said: The EoIP overhead is about 256 bytes, so, you will have problems to get more of 30 Mbps in this tunnel.Note: EoIP tunnel adds at least 42 byte overhead (8byte GRE + 14 byte Ethernet + 20 byte IP)
Thanks