D-Link DGS-3630-52PC Emulator 1 - Page 478
ip dhcp snooping vlan, show ip dhcp snooping
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DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide 27-13 ip dhcp snooping vlan This command is used to enable DHCP snooping on a VLAN or a group of VLANs. Use the no command to disable DHCP snooping on a VLAN or a group of VLANs. ip dhcp snooping vlan VLAN-ID [, | -] no ip dhcp snooping vlan VLAN-ID [, | -] Parameters VLAN-ID , - Specifies the VLAN to enable or disable the DHCP snooping function. (Optional) Specifies a series of VLANs, or separate a range of VLANs from a previous range. No space is allowed before and after the comma. (Optional) Specifies a range of VLANs. No space is allowed before and after the hyphen. Default By default, DHCP snooping is disabled on all VLANs. Command Mode Global Configuration Mode. Command Default Level Level: 12. Usage Guideline Use this command to globally enable DHCP snooping and use the ip dhcp snooping vlan command to enable DHCP snooping for a VLAN. The DHCP snooping function snoops the DHCP packets arriving at the untrusted interface on VLAN that is enabled for DHCP snooping. With this function, the DHCP packets come from the untrusted interface can be validated and a DHCP binding database will be constructed for the DHCP snooping enabled VLAN. The binding database provides IP and MAC binding information that can be further used by the IP source guard and dynamic ARP inspection process. Example This example shows how to enable DHCP snooping on VLAN 10. Switch# configure terminal Switch(config)# ip dhcp snooping vlan 10 Switch(config)# This example shows how to enable DHCP snooping on a range of VLANs. Switch# configure terminal Switch(config)# ip dhcp snooping vlan 10,15-18 Switch(config)# 27-14 show ip dhcp snooping This command is used to display the DHCP snooping configuration. 473
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