Rodrigo, chiming in here again since I brought up the test sets. All you need is a common layer 2 vlan between your two test points in your network.. We us JDSU and Accedian. In many cases some of the links we test may go through 8 or 10 switches with most being Extreme. It could be a vman between all of these or it could be a simple vlan between point A and Point B. It all depends on what kind of services you are trying to test... If you have a pair of test sets then you do not do anything different on the network side as one of the test sets will be generating the traffic and the other one is reflecting the traffic back so you can get Jitter, Latency, and packet lost... Look up RFC 2544 testing setups...