Network system, access equipment and application layer service assess method

Abstract

The invention discloses a network system, assess equipment and an application layer service access method. In the network system, the application layer service availability detection is regularly carried out among the access equipment, a main server and a backup server and the detection result is recorded; after the access equipment receives an application layer service access request from a userterminal, the access request of the user is sent to the main server according to the recorded detection result when the main server is available; and when the main server is unavailable, the access request of the user is sent to the available backup server and the backup server is used as the main server. Through the application layer availability detection of the main server and the backup server, the invention can ensure that the access equipment knows whether the application layer services of the servers are available or not in advance, and switches the service to the available server as required according to the detection result, therefore, the user cannot feel the service change of the servers in the network system.

Description

technical field [0001] The invention relates to network communication security technology, in particular to a network system, access equipment and an application layer service access method. Background technique [0002] With the rapid development of the Internet, there are more and more types of application layer services in the network. While the network bandwidth is increasing day by day, people pay more attention to the stability of application layer services in the network when choosing operators. Due to the failure of network equipment, the flow of Internet access is interrupted, even if it is only a few seconds. Therefore, today's network environment not only needs to pay attention to the accessibility of IP layer devices, but also needs to pay attention to the availability of application layer services, and to ensure that the user's application layer services can be restored in the event of a certain application layer service failure. Smoothly switch to an available...

AI Technical Summary

Problems solved by technology

figure 1 The existing detection method shown involves the user side, and the user needs to initiate a request again to switch. There are too many interactive processes, which is a waste of time; and neither the user nor the access device can always know the service availability of the network server

In addition, other existing technologies are all about server reachability detection, and there is no solution for detecting whether the server application layer service in the network is available and how to complete the switch when it is unavailable. Therefore, an application layer service is needed Access method to detect whether the application layer service of the network device is available and ensure smooth switching of user services

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