Embodiments of the present invention provide a method and a device for virtualized access. By using a type-length-value (TLV) field in an extended packet based on the Intermediate System to Intermediate System (IS-IS) protocol, the extended packet based on the IS-IS protocol can carry an address information configuration request of an access device, so that when receiving the request packet carrying the address information configuration request, a virtual control node on a network can return, to the access device, a response packet carrying address information for configuration, and therefore, the access device configures an address according to the address information in the response packet, and accesses the virtual control node according to the configured address. In this manner, virtualized access based on the IS-IS protocol by an access device is implemented, which reduces configuration processes of the access device, significantly simplifies the configuration of the access device, and reduces network maintenance costs.