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Netgear M5300-28G-POE+ (GSM7228PSv1h2) - 12-Port Managed Gigabit Switch Administrator's Guide

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Security Management 
384
Managed Switches 
3. 
Configure the port through which the DHCP server is reached as trusted. 
Here interface 1/0/1 is trusted.
a. Select Security > Control > DHCP Snooping Interface Configuration. 
A screen similar to the following displays.
b.  Select the check box for Interface 1/0/1.
c.  For Interface 1/0/1, set the Trust Mode as Enable.
d.  Click Apply. 
A screen similar to the following displays.
4. 
View the DHCP Snooping Binding table. 
a. Select Security > Control > DHCP Snooping Binding Configuration. 
A screen similar to the following displays.
5. 
Enable ARP Inspection in VLAN 1. 
a. Select Security > Control > Dynamic ARP Inspection > DAI VLAN Configuration.