Method and device for recovering IP (Internet protocol) address of DHCP (dynamic host configuration protocol) client

A dynamic host configuration and IP address technology, applied in advanced technology, electrical components, transmission systems, etc., can solve problems such as premature recovery of IP addresses, ARP entry client offline, inability to effectively determine DHCP clients, etc. Achieve the effect of reducing load pressure
CN104158917AActive Publication Date: 2014-11-19NEW H3C TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NEW H3C TECH CO LTD
Publication Date
2014-11-19

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Abstract

Recovery of an Internet Protocol (IP) address allocated to a client using Dynamic Host Configuration Protocol (DHCP) is provided. Media Access Control (MAC) address and the IP address of the client are stored. When the client is determined as being offline, MAC address and IP address of the client are determined and a DHCP release message carrying the IP address of the client is sent to an address allocation server. The client is determined as being offline based on a shutdown status of a port to which the client is connected. The port may be on the relay device, or an access device that connects the client and the relay device.
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Description

technical field

[0001] The invention relates to the technical field of address allocation, in particular to a method and equipment for recovering an Internet Protocol (IP, Internet Protocol) address of a Dynamic Host Configuration Protocol (DHCP, Dynamic Host Configuration Protocol) client. Background technique

[0002] DHCP is used to dynamically assign network configuration parameters such as IP addresses to network devices. DHCP adopts the client / server communication mode. The client submits a configuration request to the server, and the server returns the corresponding configuration information such as the IP address assigned to the client to realize the dynamic configuration of the IP address and other information.

[0003] According to the different needs of clients, DHCP provides three IP address allocation strategies: manual allocation, automatic allocation and dynamic allocation, and most of the clients use dynamic allocation. Dynamic address allocation, that is, t...

Claims

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