Reference Guide

512 | Dynamic Host Configuration Protocol (DHCP)
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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
Command
History
Usage
Information
When enabled the system begins creating entries in the binding table for the specified
VLAN(s). Note that learning only happens if there is a trusted port in the VLAN.
Related
Commands
ip dhcp relay information-option
c e s
Enable Option 82.
Syntax ip dhcp relay information-option [remote-id | trust-downstream]
Version 8.3.19.0 Introduced on S4820T
Version 8.3.7.0 Introduced on S4810
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.
Version 8.3.1.0 Introduced on E-Series.
Version 7.8.1.0 Introduced on C-Series and S-Series
ip dhcp snooping trust
Configure an interface as trusted.