Patent ID: 9495327
Filing Date: 2016-11-15
CPC Classification: G06F,H04L

Claim Text:
1. A local area network system, comprising: a dynamic host configuration protocol (DHCP) server, an intermediate device and a client, wherein the client is connected to the DHCP server through the intermediate device; the DHCP server is configured to configure a virtual local area network identifier (VLAN ID) of a port on the intermediate device according to preset configuration information, wherein the port is connected to the client, receive a DHCP request message from the intermediate device, wherein the DHCP request message carries the VLAN ID, obtain a media access control (MAC) address from the DHCP request message, obtain an IP address corresponding to the MAC address from the configuration information, and send a response message to the intermediate device, wherein the response message carries the IP address and the VLAN ID; the intermediate device is configured to modify the DHCP request message by including the VLAN ID and send the modified DHCP request message to the DHCP server, wherein the DHCP request message is from the client; and send the response message to the client; and the client is configured to send the DHCP request message to the port on the intermediate device, receive the response message, set a local virtual local area network identifier to the VLAN ID and set a local IP address to the IP address.