A method for performing a connectivity check by a first virtual proxy of a virtual access node, wherein the method comprises: obtaining identification information, wherein the identification information identifies a virtualized network function, VNF, module set of the virtual access node, the VNF module set comprising a first VNF module; obtaining address information of the first VNF module based on the identification information and a VNF module list, wherein the VNF module list comprises a correspondence between the identification information and the address information of the first VNF module; and performing a connectivity check of the first VNF module based on the address information of the first VNF module; wherein the VNF module list further comprises a correspondence between the identification information and address information of a second virtual proxy module, and the method further comprises: sending a third message to the second virtual proxy module, and a destination address of the third message is the address information of the second virtual proxy module; when the first virtual proxy module does not receive a fourth response message sent by the second virtual proxy module, determining that the second virtual proxy module and connectivity of the second virtual proxy module are abnormal; and when the first virtual proxy module receives a fourth fifth response message sent by the second virtual proxy module, sending a sixth response message to a physical node or a network management system. obtaining identification information, wherein the identification information identifies a virtualized network function, VNF, module set of the virtual access node, the VNF module set comprising a first VNF module; obtaining address information of the first VNF module based on the identification information and a VNF module list, wherein the VNF module list comprises a correspondence between the identification information and the address information of the first VNF module; and performing a connectivity check of the first VNF module based on the address information of the first VNF module; wherein the VNF module list further comprises a correspondence between the identification information and address information of a second virtual proxy module, and the method further comprises: sending a third message to the second virtual proxy module, and a destination address of the third message is the address information of the second virtual proxy module; when the first virtual proxy module does not receive a fourth response message sent by the second virtual proxy module, determining that the second virtual proxy module and connectivity of the second virtual proxy module are abnormal; and when the first virtual proxy module receives a fourth fifth response message sent by the second virtual proxy module, sending a sixth response message to a physical node or a network management system. sending a third message to the second virtual proxy module, and a destination address of the third message is the address information of the second virtual proxy module; when the first virtual proxy module does not receive a fourth response message sent by the second virtual proxy module, determining that the second virtual proxy module and connectivity of the second virtual proxy module are abnormal; and when the first virtual proxy module receives a fourth fifth response message sent by the second virtual proxy module, sending a sixth response message to a physical node or a network management system. <EOS>