Table of Contents:
First Option -Route ESP per domains
The domain routing provide you the option to select which domain will go with which ESP or to define percentage of domain to each ESP.
Second Option – route percentage per ESP connection
The ESP routing provide you the option to select which ESP's will be the default ESP's and what will be the percentage sent from each ESP.
The above two options should be combine to a mix per your needs
The global ESP routing configuration can be overwritten in 2 places: