You need to test traffic, whether you are testing circuit capacity, storm control, QOS, L2/L3 Forwarding, SD-WAN Application Policies, multicast snooping, or any of the many other things network engineers do in their day. The networking industry uses the Ixia/Spirent hardware as its gold standard. You may have even used them at work. Ostinato is used by thousands of network engineers to troubleshoot and verify their networks. Create packets by hand - specify protocols, protocol fields and other parameters to meet your needs. Configure and control several traffic-generating agents using a single controller. Python API with full scripting and automation features - everything you can do in the GUI you can also do through the API.