Filtering Traps - Unknown Trap Filter in IMC

[pattap]

I'm trying to enable unkown traps in IMC, I have it as per the below. It doesn't seem to be working though, no traps other than usual ones appear. I can see loads of SNMP coming at the server in wireshark but none of it seem to be hitting IMC itself. We have about 2000 devices in IMC, there must be something that's not defined.

[ibias]

Did you have third party devices in your network and imc (others than HPE/Aruba or Cisco)? For HPE/Aruba all traps are included in imc and also all of Cisco devices which are official supported in imc.

[pattap]

yes we do have other vendors in IMC/network