3Com 4500G DHCP Snooping設定

 [4500] dhcp-Snooping                       //啟用DHCP Snooping功能
 [4500] interface ethernet2/0/2
 [4500-Ethernet2/0/2] dhcp-snooping trust
 [4500 Ethernet2/0/2] quit
 [4500] display dhcp-snooping               //查看DHCP Snooping狀態

[DHCP snooping - 維基百科，自由的百科全書]