METHOD, DEVICE AND SYSTEM FOR DISTRIBUTING IP ADDRESS FOR USER TERMINAL

摘要

Disclosed are a method, a device and a system for distributing IP address for a user terminal. The method comprises: receiving a first DHCP message from a user terminal for requesting an IP address; generating a second DHCP message according to the first DHCP message; the second DHCP message carrying an IP address of a first physical interface and an IP address of at least one access; sending the second DHCP message to a DHCP server according to a reachable router corresponding to the IP address of the access; receiving a DHCP response message, the message carrying an IP address distributed by the DHCP server for the user terminal, wherein a destination IP address of the DHCP response message is an IP address of the access, and the IP address distributed by the DHCP server for the user terminal is from an address pool corresponding to the IP address of the first physical interface; and sending to the user terminal the IP address distributed by the DHCP server for the user terminal. By means of the present invention, the generality for dynamically distributing the IP address for the user terminal based on the DHCP protocol is improved.