For DHCPv4 servers

To configure a port or range of ports as trusted, enter this command:
switch(config)# dhcp-snooping trust <port-list>
You can also use this command in the interface context, in which case you are not able to enter a list of ports.

Setting trusted ports

switch(config)# dhcp-snooping trust 5-6
switch(config)# show dhcp-snooping

 DHCP Snooping Information

  DHCP Snooping              : Yes
  Enabled Vlans              : 4
  Verify MAC                 : Yes
  Option 82 untrusted policy : drop
  Option 82 Insertion        : Yes
  Option 82 remote-id        : mac

  Store lease database : Not configured
  Port  Trust
  ----- -----
  5     Yes
  6     Yes
  7     No

Use the no form of the command to remove the trusted configuration from a port.