Asus GIGAX2048 User Manual page 121

[DHCP Snooping is]
Enable or disable DHCP snooping on specific VLAN.
CLI command: l2 dhcpsnoop enable <vlan id list>
CLI command: l2 dhcpsnoop disable <vlan id list>
[Add/Remove Trusted Port]
Allows user to add or remove specific ports for DHCP snooping.
CLI command: l2 dhcpsnoop add <port list>
CLI command: l2 dhcpsnoop remove <port list>
[Retrieve]
Restores the previous saved settings from configuration file.
CLI command: l2 dhcpsnoo
GigaX Series L2 Managed Switch User Guide