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Technologies

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Load Balancing and Failover

L oad balancing is where two or more Broadband connections (ADSL, Cable, Fibre etc) are connected to a dedicated load-balancing router. Load balancing provides increased resilience by maintaining an Internet connection even if an individual Broadband connection goes down (failover). A load-balancing router, such as the DrayTek 3200, attempts to route Internet traffic optimally across two or more ADSL connections to deliver a better experience to broadband users simultaneously accessing Internet application. Load-balancing routers do not bond multiple Internet connections together, like bonded broadband, which is only useful for slow broadband connections.



How it Works?

Take the example of two users each simultaneously trying to view a separate 2Mbps video feed. This could not be supported on a single 3Mbps ADSL connection. However, with a load-balancing router and two 3Mbps ADSL connections, one of the 2Mbps video feeds would be routed along one of the ADSL connections, while the other 2Mbps video feed would be carried by the other ADSL connection.

Other Benefits

There are a number of DrayTek dual-WAN and Multi-WAN routers available that offer basic fail-over/fail-back capabilities. Broadband users or businesses that are concerned about the reliability of their Internet connections can connect two separate lines to such a router. The router will automatically switch to the working ADSL connection if the other connection fails (for example, due to a line fault or a failure in part of the ISP's network).

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