VIAVI TestCenter: Setup Multicast Traffic simulating host and router on the STC

I need assistance on setting up the Spirent Test center for generating multicast traffic.  Previously, our configuration was a bit simpler  with the STC simulating just a device and directly connected to a DUT. STC(Source)----DUT1(RP)---DUT2----STC(Receiver)   We are now simulating host and router on the STC and I'm not quite sure how to setup the STC configuration for multicast. The source is host1 and the receiver is host2. I'm setting up IGMP on receiver(host2) and pim-sm on both router1 and router2.   STC(Host1,router1)-----DUT1(RP)----DUT2-----STC(router2,host2)  Here is what we have on each side.   DUT1(PE) and DUT2(PE) are provider edge routers with the first one acting as the RP.  We are running BGP and PIM between the PE's and CPE's and hosts. Setup IGMP on the receiver host.  

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