Command Line Reference Guide

452 | Dynamic Host Configuration Protocol (DHCP)
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ip dhcp snooping trust
c e s
Configure an interface as trusted.
Syntax
[no] ip dhcp snooping trust
Command Modes
INTERFACE
Default
Untrusted
Command
History
ip dhcp source-address-validation
c e s
Enable IP Source Guard.
Syntax
[no] ip dhcp source-address-validation [ipmac]
Parameters
Command Modes
INTERFACE
Default
Disabled
Command
History
Usage
Information
You must allocate at least one FP block to ipmacacl before you can enable IP+MAC Source Address
Validation.
1 Use the command cam-acl l2acl from CONFIGURATION mode
2 Save the running-config to the startup-config
3 Reload the system.
ip dhcp snooping vlan
c e s
Enable DHCP Snooping on one or more VLANs.
Syntax
[no] ip dhcp snooping vlan name
Parameters
Command Modes
CONFIGURATION
Default
Disabled
Version 8.3.1.0 Introduced on E-Series.
Version 7.8.1.0 Introduced on C-Series and S-Series
ipmac
Enable IP+MAC Source Address Validation (Not available on E-Series).
Version 8.3.1.0 Introduced on E-Series.
Version 8.2.1.0
Added keyword ipmac.
Version 7.8.1.0 Introduced on C-Series and S-Series
name
Enter the name of a VLAN on which to enable DHCP Snooping.