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Method and system for realizing backup of DHCP server

An implementation method and system implementation technology, applied in the transmission system, digital transmission system, data exchange network, etc., can solve problems such as interruption of user traffic, poor user satisfaction, impact on users of access equipment, etc., to avoid offline, Stress-relieving and satisfaction-enhancing effects

Active Publication Date: 2010-06-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Based on the above method, when the primary DHCP server is unavailable, online users will fail to renew the lease, causing the user IP address to be released due to expiration, and user traffic will be interrupted. A large number of users go online concurrently, and concurrent user traffic will bring instantaneous user online impact to the access device, thus putting a lot of pressure on the network device

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  • Method and system for realizing backup of DHCP server
  • Method and system for realizing backup of DHCP server
  • Method and system for realizing backup of DHCP server

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Embodiment Construction

[0035] The basic idea of ​​the present invention is: when the online user fails to renew the lease caused by the unavailability of the main DHCP SERVER, the DHCP RELAY simulates itself as a user host, applies for an address from the standby SERVER, and realizes the backup of online user information on the standby DHCP SERVER.

[0036] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

[0037] image 3 It is a schematic flow chart of the implementation method of DHCP server backup of the present invention, as image 3 Shown, the realization method of DHCP server backup of the present invention comprises the following steps:

[0038] Step 301: The user host obtains an IP address from the main DHCP SERVER via the DHCP RELAY.

[0039] During the user's online process, the user host obtains an IP address from the main DHCPSERVER through DHCP through DHCP RELAY.

[0040] Step 302: the user host succ...

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Abstract

The invention discloses a method for realizing backup of a dynamic host configuration protocol (DHCP) server, which comprises that: a user host acquires an IP address from a main DHCP SERVER through a DHCP RELAY; the user host requests for reletting and does not receive a response of the main DHCP SERVER, the DHCP RELAY initiates an IP address request to a standby DHCP SERVER; and the DHCP RELAY applies for and acquires the IP address, and sends a compulsory reletting message to the user host. The invention also correspondingly discloses a system for realizing the backup of the DHCP server; and when the main DHCP SERVER is not available, the online user host does not need experiencing processes of releasing the IP address and applying for the IP address once again and can realize the switching of the DHCP SERVER; therefore, the method and the system can avoid off line of users due to the fault of the DHCP SERVER, improve the satisfaction of the users, and relieve the pressure of network equipment due to on line again of the users together.

Description

technical field [0001] The present invention relates to a Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, DHCP) technology, in particular to a method and system for realizing backup of a DHCP server (SERVER). Background technique [0002] In a network based on the TCP / IP protocol, the communication between computers is realized through a unique IP address. Using the DHCP protocol, the user host can dynamically request an IP address from the DHCP SERVER. Since the DHCP message adopts the broadcast mode and cannot pass through multiple subnets, the basic networking of the existing access network often introduces a DHCP relay (RELAY), so that user hosts and DHCP servers in different network segments can communicate with each other. Yes, the user host sends the request message to the DHCP RELAY, and the DHCP RELAY forwards the request message to the DHCP SERVER for processing, and the response message from the DHCP SERVER to the user is also sent to the...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/24H04L12/56
Inventor 李莹袁博
Owner ZTE CORP
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