DHCP snooping is a security feature that provides security by filtering untrusted DHCP messages. DHCP snooping functions when all DHCP servers connected to the switch are configured as trusted interfaces, when a rogue DHCP server is connected to untrusted interface DHCP snooping will drop the DHCP packets.
This post describes configuration of DHCP snooping on an HP ProCurve 2610 switch.
Configuring DHCP Snooping
Configure the VLAN with an IP Helper Address for the DHCP Server
ip helper-address 192.168.20.20
Enable DHCP Snooping globally on the switch
Enable DHCP Snooping on the required VLANs
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