Quick Reference Guide

172 DHCP Snooping
www.dell.com | support.dell.com
DELL CONFIDENTIAL – PRELIMINARY 5/15/12 – FOR PROOF ONLY
Command Mode
Global Configuration mode.
User Guidelines
There are no user guidelines for this command.
Example
The following example configures a switch to verify on an untrusted port that the source MAC
address in a DHCP packet matches the client hardware address.
ip dhcp snooping database
The ip dhcp snooping database Global Configuration mode command configures the DHCP
snooping binding file. Use the no form of this command to delete the binding file.
Syntax
• ip dhcp snooping database
• no ip dhcp snooping database
Default Configuration
The URL is not defined.
Command Mode
Global Configuration mode.
User Guidelines
• To ensure that the lease time in the database is accurate, Simple Network Time Protocol (SNTP)
is enabled and configured.
• The switch writes binding changes to the binding file only when the switch system clock is
synchronized with SNTP.
Example
The following example configures the DHCP snooping binding file.
console(config)#ip dhcp snooping verify
console(config)#ip dhcp snooping database