The purpose of this article is to demonstrate the application of Multicast Beacon and Multicast Tester on the multicast performance measurement and multicast capability test over the Taiwan Advanced Research and Education Network (TWAREN). In our design, Multicast Beacon was utilized to monitor the multicast performance among the 11 TWAREN GigaPOPs, and Multicast Tester was adopted and modified to test the multicast capability of the end user environment. Our result shows that with the combination of these two utilities a multicast-enabled network can be managed efficiently and easily.