Method for selecting line of router with multiple WAN interfaces, system and router

Abstract

The invention belongs to the field of data communication and provides a line selection method for a router with a plurality of WAN interfaces, a system and a router thereof. The method comprises the following procedures: A. receiving the request signal accessing the Internet source from a Local Area Network user, wherein, the request signal carries the source IP address data information of the user; B. querying if the corresponding access record data of IP exists in the database according to the source IP address data information, wherein, the access record data contains the source IP address data of the user and the WAN visit interface data information which is used to access the Internet source before; C. When the corresponding access record data is found, the WAN visit interface in the access record is used as the visit interface of accessing the Internet source for the user at this time; if not, the WAN visit interface for the access request from the user is chosen according to the load balancing strategy.

Description

technical field [0001] The invention belongs to the field of data communication, and in particular relates to a line selection method, system and router of a multi-WAN interface router. Background technique [0002] With the development and application of the Internet and information technology, the network access environment is becoming more and more complex. Today's routers often use multiple Internct lines to access to achieve the purpose of line backup and bandwidth superposition. [0003] At present, the following two methods are usually used for load balancing of multiple external network lines of the same Internet Service Provider (Internet Server Provider, ISP): one is flow-based load balancing, that is, according to the utilization rate of bandwidth and each wide area network (WAN) ) Interfaces are dynamically assigned one or more WAN interfaces for users. Although this method has a better effect on traffic segmentation and can fully utilize bandwidth, it is too fre...

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Problems solved by technology

[0003] At present, the following two methods are usually used for load balancing of multiple external network lines of the same Internet Service Provider (Internet Server Provider, ISP): one is flow-based load balancing, that is, according to the utilization rate of bandwidth and each wide area network (WAN) ) Interfaces are dynamically assigned one or more WAN interfaces for users. Although this method has a better effect on traffic segmentation and can fully utilize bandwidth, it is too frequent for line switching, and it is necessary to establish multiple WAN interfaces. There will be problems with connected applications; the second is policy routing based on source addresses. For example, all IP addresses covered by a router are segmented according to the number of WAN interfaces of the router, and the IP addresses in each segment are fixedly connected to a WAN interface. Although this method does not cause problems for applications, it is very unbalanced for traffic segmentation, resulting in a waste of bandwidth

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