Reference Guide

148 DHCP Filtering
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Command Mode
Interface configuration (Ethernet, Port-channel)
User Guidelines
• Configure as “trusted”, ports that are connected to a DHCP server or to other switches or
routers.
• Configure as “untrusted”, ports that are connected to DHCP clients.
• The software would flood DHCP requests to trusted ports only.
Example
The following example configures a port as trusted for DHCP filtering purposes.
show ip dhcp filtering
Use the show ip dhcp filtering EXEC command to display the DHCP filtering configuration.
Syntax
show ip dhcp filtering [ ethernet interface | port-channel port-channel-number ]
•
interface —Specify Ethernet port.
•
port-channel-number —Specify Port-channel number.
Default Configuration
The interface is untrusted.
Command Mode
EXEC
User Guidelines
There are no user guidelines for this command .
console (config)# interface 1/e7
console (config-if)# ip dhcp filtering trust