Distribution method, device and system of private network address

Abstract

An embodiment of the invention discloses a distribution method of a private network address. The method comprises the steps as follows: a DHCP (dynamic host configuration protocol) request which is from a terminal and used for requesting distributing the private network address is received; according to the DHCP request, the private network address is obtained from the position of an address distribution network element, and the private network address is obtained from the address distribution network element continuously when the obtained private network address conflicts with a stored private network address; and when the private network address obtained from the address distribution network element does not conflict with the stored private network address, a DHCP response message is returned to the terminal, and the DHCP response message carries the obtained private network address. The embodiment of the invention further discloses the distribution method, device and system of the private network address. With the adoption of the distribution method, device and system of the private network address, the private network address returned to the terminal cannot conflict with private network addresses of other terminals in a local area network, and accordingly, the terminal can perform normal network communication.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a private network address allocation method, device and system. Background technique [0002] IPV4 (Internet Protocol version 4: Internet Protocol version 4) addresses can be divided into public network addresses and private network addresses. Among them, the private network address is unique and valid in a local area network, and in different local area networks, different terminals can use the same private network address. [0003] In the same local area network, the private network address of the terminal may come from the packet data network gateway PGW or LMA (Local Mobility Anchor: Home Mobility Anchor) of different local area networks. Since PGWs or LMAs of different LANs may allocate the same private network address, the situation that two terminals in the same local area network may have the same private network address may occur. If the private network a...

AI Technical Summary

Problems solved by technology

If the private network addresses of the two terminals are the same, it is considered that an address conflict has occurred, and one of the two terminals with the same private network address cannot perform network communication normally.

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