DELL N3000 User Manual

Snooping and Inspecting Traffic

This section contains the following examples:

• Configuring DHCP Snooping
• Configuring IPSG

In this example, DHCP snooping is enabled on VLAN 100. Ports 1-20 

connect end users to the network and are members of VLAN 100. These ports 

are configured to limit the maximum number of DHCP packets with a rate 

limit of 100 packets per second. LAG 1, which is also a member of VLAN 100 

and contains ports 21-24, is the trunk port that connects the switch to the 

data center, so it is configured as a trusted port. 

The commands in this example also enforce rate limiting and remote storage 

of the bindings database. The switch has a limited amount of storage space in 

NVRAM and flash memory, so the administrator specifies that the DHCP 

snooping bindings database is stored on an external TFTP server.