The high_port_count_threshold ( with non-default value ) in the .vnmrc does not work in Spectrum 21.2.x or 22.2.x
Release : 21.2.x, 22.2.x
Component : Spectrum Core / SpectroSERVER
Use the VNM model attribute HighPortCountThreshold (0x133d9) and change the default setting of 1000 to an acceptable, then restart SpectroSERVER