MTPtestGUI (Windows and MacOS X)
This is an all-in-one automated test utility that you can use to analyze the performance of a network path between two machines. MTPtestGUI combines many of the functions of the other MTP Utilities in a single application. It also analyzes the test results and can provide suggestions for fixing problems.
Note that the tests use both TCP and UDP, so you will need to configure any firewalls to allow both through. MTPtestGUI uses UDP and TCP ports 8082. The command line version, mtptest, allows you to set any port number.
If you are planning to make a Technical Support Request (TSR), output from MTPtestGUI will be very helpful in addressing your request.