Reference Guide

DHCP Snooping Commands 629
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\CLI Folders\Dell Plasma-ARC
2+3\new_system_mifs_ARC3_latest\DHCP_Snooping.fm
DELL CONFIDENTIAL – PRELIMINARY 5/21/14 - FOR PROOF ONLY
Syntax
ip dhcp snooping trust
no ip dhcp snooping trust
Parameters
N/A
Default Configuration
The interface is untrusted.
Command Mode
Interface (Ethernet, Port Channel) Configuration mode
User Guidelines
Configure as trusted the ports that are connected to a DHCP server or to
other switches or routers. Configure the ports that are connected to DHCP
clients as untrusted.
Example
The following example configures te0/4 as trusted for DHCP Snooping.
console(config)# interface te0/4
console(config-if)#
ip dhcp snooping trust
ip dhcp snooping information option allowed-
untrusted
Use the ip dhcp snooping information option allowed-untrusted Global
Configuration mode command to allow a device to accept DHCP packets
with option-82 information from an untrusted port. Use the no form of this
command to drop these packets from an untrusted port.
Syntax
ip dhcp snooping information option allowed-untrusted
no ip dhcp snooping information option allowed-untrusted