Dell PowerConnect 55xx Systems User Guide 579
FILE LOCATION:  C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\Dell 
Contax\CxUGSwitching_DHCP.fm
DELL CONFIDENTIAL – PRELIMINARY 9/11/12 - FOR PROOF ONLY
The following is an example of some of the CLI commands: 
console(config)# ip dhcp snooping
console(config)# ip dhcp snooping information option 
allowed-untrusted
console(config)# ip dhcp snooping verify
console(config)# ip dhcp snooping database
console(config)# ip dhcp snooping database frequency 1200
console# show ip dhcp snooping
DHCP snooping is enabled
DHCP snooping database: enabled
Option 82 on untrusted port is allowed
Verification of hwaddr field is enabled
DHCP snooping file update frequency is configured to: 1200 
seconds
Interface Trusted
--------- ----------
gi2/0/1 yes
gi2/0/2 yes