Method, device and system for obtaining medium access control address

Abstract

The present invention discloses a method for getting the MAC address, which relates to the network communication field. First, an LAC gets the MAC address of a user terminal; then, the LAC sends a session control message carrying the MAC address of the user terminal to an LNS; at last, the LNS gets the MAC address of the user terminal according to the session control message. The present invention also discloses a system for getting the MAC address, an LAC and an LNS. The present invention makes the LNS capable of getting the MAC address of the user terminal through the session control message carrying the MAC address of the user terminal. A DHCP server can allocate IP addresses for the user terminal according to the MAC address of the user terminal, which is favorable for the IP addresses centralized management. Moreover, a RADIUS Server can also perform authentication, accounting and management to the users according to the MAC address of the user terminal.

Description

technical field [0001] The present invention relates to the field of network communication, in particular to a method, system and device for acquiring a MAC (MediaAccessControl, Media Access Control) address. Background technique [0002] LAC (L2TP Access Concetrator, L2TP Access Concentrator) is a device attached to the switching network with Point-to-Point Protocol (PPP, Point to Point Protocol) end system and L2TP (Layer 2Tunneling Protocol, Layer 2 Tunneling Protocol) protocol processing capabilities. One end point of the L2TP tunnel, LAC is generally a network access server, mainly used to provide users with access services through PSTN / ISDN (Public Switched Telephone Network, Public Switched Telephone Network / Integrated Service Digital Network, Integrated Service Data Network) and other networks . LNS (L2TP Network Server, L2TP network server) is a server end used to process the L2TP protocol on the PPP end system. The LAC is located between the LNS and the remote sy...

AI Technical Summary

Problems solved by technology

However, the L2TP tunnel is used to establish the connection between the LAC and the LNS, and the LNS cannot obtain the MAC address of the L2TP user. Therefore, the user terminal cannot allocate an IP address from the remote DHCP Server, but can only obtain an IP address from the local address pool on the LNS device.

[0004] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: because the remote DHCP Server assigns the IP address to the user terminal, and the RADIUS Server authenticates, bills and manages the user, all need the MAC address of the user terminal , and the LNS cannot obtain the MAC address of the user terminal, thus causing the user terminal to fail to obtain the IP address from the DHCP server, which is not conducive to the centralized management of IP addresses

Moreover, due to the lack of the MAC address of the user terminal, the RADIUS Server cannot perform authentication, accounting and management on the user.

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