What tools you can implement traffic load balancing between 3G and ADSL?
Problem: load balancing between the two output channels to the global network.
Have gateway on Win Server 2012, 3g modem in the server and ADSL modem that connects in bridge mode.
Details: 3G in the daytime you need to limit the quota, preferably hourly.
Put next to a normal router, for example routerboard.com/RB750r2 and implement all on RouterOS. Windows task practically can not be solved, only "third-party" software.
Harley51 answered on July 9th 19 at 13:57
Balancing between these two types of connection - inappropriate.
Balance has a meaning at least similar in type and characteristics of the channels.
In your case it is better to implement a division of customers between connections or just failover (redundancy in case of a failure of the channel).