Netgear M4300-24X24F (XSM4348S) - Stackable Managed Switch with 48x10G including 24x10GBASE-T and 24xSFP+ Layer 3 Guia Do Administrador

To prevent DHCP packets being used as DoS attachments when DHCP snooping is 
enabled, the snooping application enforces a rate limit for DHCP packets received on 
untrusted interfaces. DHCP snooping monitors the receive rate on each interface separately. 
If the receive rate exceeds the configured limit, DHCP snooping brings down the interface. 
The user must specify “no shutdown” on this interface to further work with that port. 

Control the maximum rate of DHCP messages.

View the rate configured. 

Select Security > Control > DHCP Snooping > Interface Configuration. 

A screen similar to the following displays.

Select the interface, fill in the Rate Limit (pps) field, and then click Apply.

(Netgear Switch) (Interface 1/0/2)# ip dhcp snooping limit rate 5

(Netgear Switch) #show ip dhcp snooping interfaces 1/0/2

Interface     Trust State     Rate Limit      Burst Interval

                                 (pps)           (seconds)

----------   -------------   -------------   ---------------

1/0/2              No               5                 1