question about radsec and FR3

Hi, Quick question about setting up radsec and FR3. When I was playing with RADSEC and Radiator, a permanent link was established between two radsec endpoints ( had radsec/ipv4 -> Ubuntu VM out in the cloud and then radsec/ipv6 -> Radiator on OS X machine at home). Should FR do this as well, or does it just establish a connection whenever it needs one? Had some sort of success with radsecproxy and FR3 but then FR3 complained about exceeding max client connections (>16) Rgds Alex