Netgear M5300-52G-POE+ (GSM7252PSv1h2) - ProSAFE 48+4 L2+ POE Stackable Managed Switch Administrator's Guide

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Security Management 
383
 Managed Switches
Web Interface: Configure Dynamic ARP Inspection
1. 
Enable DHCP snooping globally.
a. Select Security > Control > DHCP Snooping Global Configuration
A screen similar to the following displays.
b.  For DHCP Snooping Mode, select the Enable radio button.
c.  Click Apply
2. 
Enable DHCP snooping in a VLAN. 
a. Select Security > Control > DHCP Snooping Global Configuration
A screen similar to the following displays.
b.  In the VLAN ID field, enter 1
c.  In the DHCP Snooping Mode field, select Enable
A screen similar to the following displays.