Chain balancing method based on domain name system (DNS)

Abstract

The invention discloses a chain balancing method based on a domain name system (DNS). The method includes the steps that when a network is provided with two or more outlet links, a load including links and network service or a usability state is to serve as balance factors of the links, user query requests are dynamically divided into different views to achieve load balance of the links according to a weight or priority or residual available bandwidth ratio or residual available bandwidth absolute value method. The problem that in the prior art, link bandwidth utilization is imbalanced as a fixed IP address range is adopted to divide user view is effectively solved, a fault-tolerant mechanism is provided, and it is avoided that when the links or a server has faults, follow-up flow continues to be guided into the failed links or server. Only a view dividing mode is changed in the DNS server without additionally arranging hardware, and the operation is visible for a network user; the client side is not changed, and normal operation and behaviors of existing users are not interfered. Therefore, popularizing prospects are good.

Description

technical field [0001] The invention relates to a DNS-based link equalization method, which belongs to the technical field of computer network communication. Background technique [0002] Domain Name System DNS (Domain Name System) realizes load balancing by dividing users into different views so as to resolve user requests through different egress links. The current division rules are based on the access control list ACL (Access Control List), and divide the view by limiting the IP range. For example, in the recursive server mode, the division of views is carried out by IP address: users with IP addresses in the range of 10.0. To query; users with IP addresses in the range of 10.0.1.0-10.0.1.255 are divided into another view, and then query from the exit link of this view. In the mode of the authoritative resolution server, the division of views is also carried out by IP address: the DNS requests of users with IP addresses in the range of 220.18.0.0-220.18.0.255 are divid...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a DNS-based link balancing method, which dynamically divides users, and can solve the problem of link bandwidth usage caused by view user division through fixed IP address ranges in the prior art Unbalanced problems, while providing a fault-tolerant mechanism to avoid continuing to guide subsequent traffic to the failed link or server when the link fails or the server fails

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