SA500 today implements flow based round robin load balancing scheme.
In the case of two WAN link (over ADSL), by default, the traffic should be "roughly" equally distributed.
So in general, users should have no need to configure anything further for load balancing.
The SA500 also supports protocol binding (~PBR) over WAN links. This mechanism offers more control on how traffic can flow.
For example, if you have 1 ADSL with higher throughput than the other ADSL link offers, you can consider to bind bandwidth-hungry app on the WAN link connecting to the higher ADSL link and the less bandwidth-hungary app on the other one. The other traffic can continue to do round robin. This way you won't saturate the low bandwidth link and give users better application experiences.
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