Realization method and device for WLAN subnet terminal and wireless access client
An implementation method and wireless access technology, applied in the directions of wireless communication, wireless network protocol, network topology, etc., can solve the problems of not supporting WDS, unable to send DHCP response message, unable to realize DHCP dynamic IP address allocation scheme, etc. The effect of reducing functional requirements
Active Publication Date: 2009-08-26
NEW H3C TECH CO LTD
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[0007] However, currently commonly used AP devices often do not support WDS. That is to say, for the DHCP packets transparently transmitted to the AP device by the terminal of the subnet through the wireless client, the source MAC address of the packet is changed to the MAC address of the wireless client, causing the AP to The device cannot send the DHCP response message to the subnet terminal, and the dynamic IP address allocation scheme of DHCP cannot be implemented.
[0008] Therefore, for the WLAN networking architecture in which the subnet is connected to the local area network through the AP in a wireless manner, the existing technology cannot realize the dynamic IP address allocation of the subnet terminal based on the commonly used AP device that does not support WDS
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[0047] Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention.
[0048] The main idea of the present invention is to identify the two sides of the DHCP interaction through a unique identifier, and replace the MAC address based on the identifier, so that the DHCP message between the AP and the subnet terminal can be correctly addressed, thereby solving the commonly used, unsupported WDS AP equipment cannot realize the problem of dynamic IP address allocation of subnet terminals. Like this, in order to help readers better understand the present invention, below at first by introducing the existing technology that adopts DHCP to carry out dynamic IP address distribution, as figure 2 As shown in , it shows the message interaction diagram of IP address allocation using DHCP. Among them, there are four commonly used DHCP ...
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The invention discloses a DHCP realization method and a DHCP realization device for WLAN subnet terminal, and also discloses a wireless access client which is suitable for WLAN configuration bridged by subnet and AP through wireless Client. The wireless Client receives DHCP message initiated by the subnet terminal, corresponding relation of a selected label in the DHCP message and source MAC address is recorded in a mapping list, and the source MAC address is replaced to Client Radio MAC to transmit to AP; wherein, the selected label keeps constant in a interaction process of the subnet terminal and the AP; and the wireless Client receives DHCP message replied by the AP, modifies aim MAC to MAC address of corresponding subnet terminal according to the mapping list and transmits the MAC address to the corresponding subnet terminal for unicast DHCP message recorded with the selected label in the mapping list. The present invention can realize dynamic IP address distribution of the subnet terminal based on common AP device which does not support WDS, and is simple and easy.
Description
technical field [0001] The present invention relates to the field of WLAN (Wireless Local Area Network, wireless local area network), in particular to a method for implementing DHCP of a WLAN subnet terminal and a device for implementing DHCP of a WLAN subnet terminal, and also relates to a wireless access client (referred to as Wireless Client). Background technique [0002] WLAN provides a wireless connection service of a local area network, that is, realizes high-speed data access from a terminal to a local area network in a wireless manner. [0003] As a network architecture of WLAN, the terminal can directly access the local area network through AP (Access Point) in a wireless manner; as an improved network architecture of WLAN, the subnet can be connected wirelessly through the AP. into the LAN, figure 1 It shows such a networking example of WLAN: the laboratory subnet is interconnected with the wireless AP (Access Point, access point) device of the company office ne...
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IPC IPC(8): H04L29/12H04W8/26H04W80/02H04W84/12
Inventor 常慧锋
Owner NEW H3C TECH CO LTD