My name is Ritesh Sharma from Cisco TAC.
The DHCP trust/untrust ports can be created by enabling a feature called DHCP snooping in the switch.
However, SG200 is L2 switch only, so this mean switch will not support dhcp snooping.
It is supported on switches SG300/500, Sg350/550 etc.
Please mark this as helpful of it resolves your query.
... View more