Allied Telesis AT-GS950/24 - Manual (Page 302)

Chapter 22: DHCP Snooping
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General Guidelines
Here is a summary of the rules to observe when you configure DHCP
Snooping:
 A trusted port is connected to one of the following:
– Directly to the legitimate trusted DHCP Server.
– A network device relaying DHCP messages to
and from a trusted server.
– Another trusted source, such as a switch with
DHCP Snooping enabled.
 Untrusted ports are connected to DHCP clients and to
traffic that originates outside of the local area network.
 The VLANs to which the DHCP Snooping feature
applies must be specified in the DHCP Snooping
VLAN Setting configuration.
 Any static IP addresses on the network must be
manually added to the Binding Database.