DHCP address allocation method and device

Abstract

The embodiment of the invention provides a DHCP address allocation method and device. The method comprises the following steps that: a media access control (MAC) address first message carrying a client and sent by the client is received, the first message is used for requesting an internet protocol IP address from each server, the server determines whether the IP address corresponding to the MAC address is allocated to the client before according to the MAC address carried in the first message, and if so, the server continues to allocate the IP address allocated before to the client; and if not, the server allocates the idle IP address which is not used locally to the client. According to the embodiment of the invention, the server queries the local IP address allocation record before allocating the address, and can continuously allocate the IP address used by the client to the client, thereby ensuring that the client in networking can keep the uniqueness of the address, and providingconvenience for a series of services and management functions.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a DHCP address allocation method and device. Background technique [0002] Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, hereinafter referred to as DHCP), is a LAN network protocol, using the UDP protocol to work, the server controls a range of IP addresses, when the client logs in to the server, it can automatically obtain the IP address and subnet assigned by the server. netmask. Two commonly used ports for DHCP include: 67 (DHCP server) and 68 (DHCP client). DHCP is usually used in a LAN environment. Its main function is to centralize management and assign IP addresses, so that the client can dynamically obtain information such as IP addresses, Gateway addresses, and DNS server addresses, and can improve the utilization rate of addresses. Simply put, DHCP is a protocol that automatically assigns IP addresses and other information to intranet mac...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in the DHCP protocol, when the client requests an address from the server, the server will traverse unallocated or expired addresses and assign them to the client according to the address range from small to large, but this address allocation method As a result, the assigned address of the client end may be different each time, which brings inconvenience to management

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