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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
488
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 4-146), 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 4-149).
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.
Console(config)#ip dhcp snooping vlan 1
Console(config)#
Related Commands
ip dhcp snooping
ip dhcp snooping trust
ip dhcp snooping trust
This command configures the specified interface as trusted. Use the no form to restore the default setting.
Syntax
[no] ip dhcp snooping trust
Default Setting
All interfaces are untrusted