To link the load balance is mainly refers to the application of multiple ISP network export, for example telecom + netcom, telecom + CRC, air vibration balancing instrument to link load balancing is to resolve the telecom, netcom, interconnection of the most professional technology. Its implementation principle is based on load balancing algorithm to calculate, to the destination address of the data from which link out the minimum delay, so this link will be preferred. This is different from policy routing load balancers + IP address library implementation netcom telecom routing.

In a strict sense, load balancing the server is load balancing the same application, and has little to do with the server itself. The aero vibration balancer has only the same application, Didn't exist, the concept of load balancing, is cannot make the load balance between different applications. For example, we have each one FTP SERVER and a WEB SERVER, so there is no load balance between the two SERVER applications. Currently all manufacturers realize load balance to the SERVER load balance are based on the virtual IP technology, load balancing equipment health check was carried out on the SERVER, and then the test results included in the equipment list SERVER status, according to the test results to determine a request sent to which SERVER the best effect, is widely used in F5 LTM series.

To wan load balancing is mainly applied to some big website, has said it is beyond the load balance. For example, we have two WEB server, an IDC room (CNC) in Beijing, a vibration balancing instrument air in guangzhou IDC room (telecom), two WEB server content is the same. So the two servers for load balancing is a kind of wide area network load balancing. Application is more extensive F5 equipment.