Ethernet circuit testing

More often on Ethernet services, we experience a customer wanting to see more than an Ookla based server test from our network. Our hands in the field are limited in the number of Ethernet smart loopback devices that they own. If we do have a tester on site, we can generate traffic from an Exfo purpose built appliance toward the loop and determine results. Too often, we have found things such as ftp downloads to be unreliable based on use of server, windows PC doing the download, etc. What other methods are you guys using for testing these services?