How many number of ue's does an free5gc support?

Hi bro,
I’ve googled sig but can not find what it means. You mean in order to test the throughput firstly I need a UE and a wireless environment. Than run iperf3 -c server_ip in the UE, and run iperf3 -s server_ip in server which runs upf behind sig(I guess it is a gateway in front of the server). Am I right? Sorry for keep bothering you and thanks for your kindness.

hi
Yes,sgi is the interface to internet or your own private network.
br,thornton