Method and device of going repeating in configuration procedue of dynamic host address

A technology of address configuration and dynamic host, which is applied in the Internet field and can solve problems affecting normal terminal network communication and low efficiency

Active Publication Date: 2006-09-20
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in order to prevent illegal DHCP servers from assigning IP addresses, if the method of manual search is adopted, the efficiency is too low; if the method of manual search is not adopted, and the method of prohibiting network communication of physical ports is adopted, it will affect the network communication of normal terminals
Existing technology cannot solve this contradiction

Method used

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  • Method and device of going repeating in configuration procedue of dynamic host address
  • Method and device of going repeating in configuration procedue of dynamic host address
  • Method and device of going repeating in configuration procedue of dynamic host address

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Embodiment Construction

[0036] The core idea of ​​the present invention is: the difference between the message sent when the DHCP server in the subnet is used to allocate IP addresses and the message sent when the DHCP server outside the subnet performs IP address allocation is determined by the switch located on the subnet switch. The DHCP relay agent analyzes all received packets for IP address assignment, and then uses the ACL of the switch to discard the packets for IP address assignment sent by illegal DHCP servers in the subnet.

[0037]In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Please refer to figure 1 , figure 1 It is a flow chart when the DHCP server assigns IP addresses.

[0039] figure 1 (a) is a flow chart of assigning IP addresses when the DHCP server and the DHCP client are located in th...

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PUM

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Abstract

The legal DHCP server is located outside of sub-network. The illegal DHCP server is located inside of the sub-network. An access and control list (ACL) of the sub-network exchange is set. The sub-network exchange is indicated to discard the DHCP message from illegal DHCP server. It invention includes: A) according to said ACL decides if the received DHCP message needs to be discarded, if yes, then discarding the message and ending the current process; if not, then turning to step B; B)according to the source of the received DHCP message, sending message to the DHCP client side or the legal DHCP server. The invention also provides a relay apparatus in dynamic host configure process.

Description

technical field [0001] The invention relates to Internet technology, in particular to a method for relaying during dynamic host address configuration. Background technique [0002] With the expansion of the network scale, the number of terminals in the subnet often exceeds the assignable Internet Protocol (Internet Protocol, IP) addresses. But the actual situation is that these terminals do not always need to occupy IP addresses. For example, when they are turned off or portable to other subnets, they will no longer occupy the IP addresses of the atomic network. Aiming at this situation, a common solution is to use Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, DHCP) to dynamically allocate IP addresses. As a DHCP client, a terminal that needs to occupy an IP address dynamically requests configuration information from a DHCP server, and the DHCP server returns corresponding configuration information, including an IP address, according to a configu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L29/06
Inventor 邱元香
Owner NEW H3C TECH CO LTD
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