The RVI interfaces on the SRX and EX are the same at least one member interface has to be link up for the RVI to be up.
I can't find any SRX specific docs for the new layer 2 and I don't have a new series box. But I would assume this will work the same way we configure them on the MX series. You add the interfaces to the bridge domain and setup the layer 3 IRB interface add this to the same bridge domain.
