Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 498

Configuring DHCP Snooping
You can configure DHCP snooping for a single VLAN or a range of VLANs:
To configure a single VLAN, enter a single VLAN number.
•
To configure a range of VLANs, enter a beginning and an ending VLAN number or a dash-separated
•
pair of VLAN numbers.
You can enter a comma-separated list of VLAN numbers and dash-separated pairs of VLAN
•
numbers.
This example shows how to enable DHCP snooping on VLANs 10 through 12:
Router# configure terminal
Router(config)# ip dhcp snooping vlan 10 12
Router(config)#
This example shows another way to enable DHCP snooping on VLANs 10 through 12:
Router# configure terminal
Router(config)# ip dhcp snooping vlan 10-12
This example shows another way to enable DHCP snooping on VLANs 10 through 12:
Router# configure terminal
Router(config)# ip dhcp snooping vlan 10,11,12
This example shows how to enable DHCP snooping on VLANs 10 through 12 and VLAN 15:
Router# configure terminal
Router(config)# ip dhcp snooping vlan 10-12,15
This example shows how to verify the configuration:
Router(config)# do show ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
10-12,15
DHCP snooping is operational on following VLANs:
none
DHCP snooping is configured on the following Interfaces:
Insertion of option 82 is enabled
Verification of hwaddr field is enabled
Interface
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Router#
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
34-10
Trusted Rate limit (pps)
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Chapter 34 Configuring DHCP Snooping
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