DHCP Filtering 291
6 Utility Commands
responses received on a trusted port are forwarded. Make sure that all other ports are untrusted
so that any DHCP (or BootP) responses received are discarded.
You can configure DHCP filtering on physical ports and LAGs. DHCP filtering is not operable
on VLAN interfaces.
ip dhcp filtering
This command enables DHCP filtering globally.
Default disabled
Format
ip dhcp filtering
Mode Global Config
no ip dhcp filtering
This command disables DHCP filtering.
Format
no ip dhcp filtering
Mode Global Config
ip dhcp filtering trust
This command configures an interface as trusted.
Default
untrusted
Format ip dhcp filtering trust
Mode Interface Config
no ip dhcp filtering trust
This command returns an interface to the default value for DHCP filtering.
Format
no ip dhcp filtering trust
Mode Interface Config
show ip dhcp filtering
This command displays the DHCP filtering configuration.
Format
show ip dhcp filtering
Mode Privileged EXEC
Interface The interface by slot/port.
Trusted Indicates whether the interface is trusted or untrusted.
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