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IP address allocation method and IP address allocation device based on dynamic host configuration protocol

A technology of dynamic host configuration and IP address, applied in the field of communication, can solve the problem of host failure to apply for IP, and achieve the effect of satisfying reasonable usage requirements and reasonable distribution of network resources

Inactive Publication Date: 2014-02-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide an IP address allocation method and device based on a dynamic host configuration protocol to solve the problem in the prior art that a host fails to apply for an IP when network resources are limited.

Method used

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  • IP address allocation method and IP address allocation device based on dynamic host configuration protocol
  • IP address allocation method and IP address allocation device based on dynamic host configuration protocol
  • IP address allocation method and IP address allocation device based on dynamic host configuration protocol

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Embodiment Construction

[0018] In order to solve the problem in the prior art that the newly added client fails to apply for IP when the network resources are limited, the present invention provides a DHCP-based IP address allocation method and device, figure 1 This is a schematic diagram of a network for allocating IP addresses based on DHCP in the embodiment of the present invention. In the case that all IP addresses have been allocated, the present invention can be used to successfully allocate IP to some new clients entering the network. figure 1 The solid line in the network indicates that the newly-connected client requests an IP from the DHCP server, and the dotted line indicates that the DHCP server successfully assigned an IP to the client.

[0019] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present invention, but not...

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Abstract

The invention discloses an IP address allocation method and an IP address allocation device based on a dynamic host configuration protocol (DHCP). According to the invention, the priority level of a DHCP client is specified and priority information is carried in request and feedback messages in the IP allocation process to enable a DHCP server to know the priority level of the client requesting an IP. Therefore, high-priority clients can be accessed to a network first and access is not provided for low-priority clients when IP resources are not enough. The allocation mechanism provided by the invention enables high-priority clients to be successfully accessed to a network under the situation of limited network resources, thereby meeting the reasonable needs of users to the maximum extent and enabling limited network resources to be reasonably distributed.

Description

technical field [0001] The invention relates to the field of communications, in particular to a method and device for assigning IP addresses based on a dynamic host configuration protocol. Background technique [0002] The Dynamic Host Configuration Protocol (DHCP) is used to allow a host on the network to obtain an IP (Internet Protocol, Inter-Network Interconnection Protocol) address and related configuration information from a DHCP server that allows it to communicate normally. The general steps for: [0003] 1) The host sends a broadcast message DHCPDiscover requesting the IP address and related configuration information; [0004] 2) The DHCP server sends back a unicast message DHCPOffer that contains a valid IP address and related configuration information (such as gateway address, domain name server address, etc.); [0005] 3) The host selects the server corresponding to the DHCPOffer that arrives first, and sends it a [0006] Broadcasted REQUEST, indicating the re...

Claims

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Application Information

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IPC IPC(8): H04L29/12
Inventor 廖明
Owner ZTE CORP
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