A communication method includes obtaining, by a source remote direct memory access (RDMA) network interface card (RNIC), to-be-transmitted data sent by a source virtual RNIC (vRNIC), obtaining, by the source RNIC, identity indication information of a destination vRNIC and packet forwarding information, and encapsulating, by the source RNIC, the to-be-transmitted data to obtain a target packet, and sending the target packet to a destination RNIC, where the destination vRNIC is a vRNIC running on the destination RNIC.