We would like to describe our scenario as follows.
We hosted our internet gateway at a service provider which is away from our site about 10 km distance. The total internet b/w is 8Mbps. To connect the internet service provider, we have two lastmile connectivity with two different service providers each 4mb as a last mile. Both put together it will be 8Mbps. The lastmile by the service providers are through ethernet.
Our main objective is to utilise both last mile connectivity by bundling or through any other optimum method.
There are common perception that the ethernets cannot be bundled.