4-304
ip dhcp snooping trust (4-305)
ip dhcp snooping vlan
This command enables DHCP snooping on the specified VLAN. Use the
no form to restore the default setting.
Syntax
[no] ip dhcp snooping vlan vlan-id
vlan-id - ID of a configured VLAN (Range: 1-4094)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• When DHCP snooping enabled globally using the ip dhcp snooping
command (page -301), and enabled on a VLAN with this command,
DHCP packet filtering will be performed on any untrusted ports
within the VLAN as specified by the
ip dhcp snooping trust
command (page -305).
• When the DHCP snooping is globally disabled, DHCP snooping can
still be configured for specific VLANs, but the changes will not take
effect until DHCP snooping is globally re-enabled.
• When DHCP snooping is globally enabled, configuration changes for
specific VLANs have the following effects:
• If DHCP snooping is disabled on a VLAN, all dynamic bindings
learned for this VLAN are removed from the binding table.
Example
This example enables DHCP snooping for VLAN 1.
Related Commands
ip dhcp snooping (4-301)
Console(config)#ip dhcp snooping vlan 1
Console(config)#
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