D-Link DGS-6600-48T Product Manual - Page 233

DGS-6604 ip dhcp snooping ip dhcp snooping Use this command to globally enable DHCP snooping. Use no command to disable DHCP snooping. ip dhcp snooping no ip dhcp snooping Syntax None Default Disabled Command Mode Usage Guideline Example Global configuration The DHCP snooping function snoops the DHCP packets arriving at the untrusted interface on VLAN that is enabled for DHCP snooping. With this function, the DHCP packets coming from the un-trusted interface can be validated, and a DHCP binding database will be constructed for the DHCP snooping enabled VLAN. The binding database provides IP and MAC binding information that can be further used by the IP source guard and dynamic ARP inspection process. Use the ip dhcp snooping command to globally enable DHCP snooping. Use the ip dhcp snooping vlan command to enable DHCP snooping for a VLAN. DHCP snooping process occurs during the relay agent relays the packet. To enable the DHCP relay service, relay agent service must be enabled by service dhcp command, and the server address to relay the packet must be configured by the ip dhcp relay address. These examples shows how to enable and disable DHCP snooping: Switch# configure terminal Switch(config)# ip dhcp snooping Switch(config)# Switch# configure terminal Switch(config)# no ip dhcp snooping Switch(config)# CLI Reference Guide 223