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

Enable DHCP snooping globally.

(Netgear Switch) (Config)# ip dhcp snooping

Enable DHCP snooping in a VLAN. 

(Netgear Switch) (Config)# ip dhcp snooping vlan 1

Configure the port through which the DHCP server is reached as trusted. 

(Netgear Switch) (Config)# interface 1/0/1

(Netgear Switch) (Interface 1/0/1)# ip dhcp snooping trust

 

View the DHCP Snooping Binding table.

(GSM7328S) #show ip dhcp snooping binding

Total number of bindings:  1

MAC Address       

 

IP Address     

 

VLAN 

 

Interface 

 

 Type    

 

Lease (Secs)

-----------------  --------------

 

 ----  ---------- 

 

-------  -----------

00:16:76:A7:88:CC 

 

192.168.10.86 

 

 1 

 

   1/0/2

 

      DYNAMIC

 

 86400

 

Enable ARP inspection in VLAN 1.

(Netgear Switch) (Config)# ip arp inspection vlan 1

 

Now all ARP packets received on ports that are members of the VLAN are copied to the 
CPU for ARP inspection. If there are trusted ports, you can configure them as trusted in 
the next step. ARP packets received on trusted ports are not copied to the CPU. 

Configure port 1/0/1 as trusted.

(Netgear Switch) (Config)# interface 1/0/1

(Netgear Switch) (Interface 1/0/1)# ip arp inspection trust

 

Now, ARP packets from the DHCP client go through because a DHCP snooping entry exists. 
However, ARP packets from the static client are dropped. For information about how to 
prevent ARP packets from static clients to be dropped, see 

386.