A communication proxy method, comprising: receiving, by a communication proxy device, a packet communicated between a provider device and an access device; converting, by the communication proxy device, a physical port identifier, ID, of the access device in the received packet to a corresponding logic port identifier, ID, of the provider device or converting the logic port identifier of the provider device in the received packet to the corresponding physical port identifier of the access device according to a preset mapping information between a physical port of the access device and a logic port of the provider device, wherein the mapping information comprises a physical port ID of the physical port and a logic port ID of the logic port; and sending, by the communication proxy device, the packet after the conversion process. wherein the packet is a layer 2 control, L2C, packet, or a Dynamic Host Configuration Protocol, DHCP, packet, or a PPP over Ethernet, PPPoe, packet, wherein, in a Digital Subscriber Line, DSL, system, the physical port ID comprises at least one of an actual access node ID, a chassis ID, a rack ID, a frame ID, a slot ID, a sub-slot ID and a port ID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access node ID, a virtual chassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID and a virtual port ID or a character string; in a Passive Optical Network, PON, system, the physical port ID comprises at least one of the actual access node ID, the chassis ID, the rack ID, the frame ID, the slot ID, the sub-slot ID, a PON interface ID, an optical network unit ID, a Transmission container ID, T-CONT ID a port ID and a virtual local line ID, LLID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access network ID, a virtualchassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID, a virtual PON interface ID, a virtual optical network unit ID, a virtual T-CONT ID, a virtual port ID and a virtual LLID, or a character string; or in a wireless access system, the physical port ID comprises at least one of the actual access network ID, the chassis ID, the rack ID, the frame ID, the slot ID, the sub-slot ID, a remote radio unit ID, RRUID, a sector ID, a frequency point ID, a channel ID, a service flow ID, SFID, and connection ID, CID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access network ID, a virtual chassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID, a virtual remote radio unit ID, RRUID, a virtual sector ID, a virtual frequency point ID, a virtual channel ID, a virtual service flow ID, SFID and a virtual connection ID, or a character string. receiving, by a communication proxy device, a packet communicated between a provider device and an access device; converting, by the communication proxy device, a physical port identifier, ID, of the access device in the received packet to a corresponding logic port identifier, ID, of the provider device or converting the logic port identifier of the provider device in the received packet to the corresponding physical port identifier of the access device according to a preset mapping information between a physical port of the access device and a logic port of the provider device, wherein the mapping information comprises a physical port ID of the physical port and a logic port ID of the logic port; and sending, by the communication proxy device, the packet after the conversion process. wherein the packet is a layer 2 control, L2C, packet, or a Dynamic Host Configuration Protocol, DHCP, packet, or a PPP over Ethernet, PPPoe, packet, wherein, in a Digital Subscriber Line, DSL, system, the physical port ID comprises at least one of an actual access node ID, a chassis ID, a rack ID, a frame ID, a slot ID, a sub-slot ID and a port ID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access node ID, a virtual chassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID and a virtual port ID or a character string; in a Passive Optical Network, PON, system, the physical port ID comprises at least one of the actual access node ID, the chassis ID, the rack ID, the frame ID, the slot ID, the sub-slot ID, a PON interface ID, an optical network unit ID, a Transmission container ID, T-CONT ID a port ID and a virtual local line ID, LLID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access network ID, a virtualchassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID, a virtual PON interface ID, a virtual optical network unit ID, a virtual T-CONT ID, a virtual port ID and a virtual LLID, or a character string; or in a wireless access system, the physical port ID comprises at least one of the actual access network ID, the chassis ID, the rack ID, the frame ID, the slot ID, the sub-slot ID, a remote radio unit ID, RRUID, a sector ID, a frequency point ID, a channel ID, a service flow ID, SFID, and connection ID, CID; and the logic port ID is Arabic numerals arranged in sequence, or at least one of a virtual access network ID, a virtual chassis ID, a virtual rack ID, a virtual frame ID, a virtual slot ID, a virtual sub-slot ID, a virtual remote radio unit ID, RRUID, a virtual sector ID, a virtual frequency point ID, a virtual channel ID, a virtual service flow ID, SFID and a virtual connection ID, or a character string.