Enabling The Cisco Ios Dhcp Server Database - Cisco IE-3000-8TC Software Configuration Manual

Configuring DHCP Snooping
Command
Step 10
ip dhcp snooping verify mac-address
Step 11 end
Step 12
show running-config
Step 13 copy running-config startup-config
To disable DHCP snooping, use the no ip dhcp snooping global configuration command. To disable
DHCP snooping on a VLAN or range of VLANs, use the no ip dhcp snooping vlan vlan-range global
configuration command. To disable the insertion and removal of the option-82 field, use the no ip dhcp
snooping information option global configuration command. To configure an aggregation switch to
drop incoming DHCP snooping packets with option-82 information from an edge switch, use the no ip
dhcp snooping information option allow-untrusted global configuration command.
This example shows how to enable DHCP snooping globally and on VLAN 10 and to configure a rate
limit of 100 packets per second on a port:
Switch(config)# ip dhcp snooping
Switch(config)# ip dhcp snooping vlan 10
Switch(config)# ip dhcp snooping information option
Switch(config)# interface gigabitethernet1/1
Switch(config-if)# ip dhcp snooping limit rate 100

Enabling the Cisco IOS DHCP Server Database

For procedures to enable and configure the Cisco IOS DHCP server database, see the "DHCP
Configuration Task List" section in the "Configuring DHCP" chapter of the Cisco IOS IP Configuration
Guide, Release 12.2 from the Cisco.com page under Documentation > Cisco IOS Software > 12.2
Mainline > Configuration Guides.
Cisco IE 3000 Switch Software Configuration Guide
23-10
Chapter 23
Purpose
(Optional) Configure the switch to verify that the source MAC address in
a DHCP packet that is received on untrusted ports matches the client
hardware address in the packet. The default is to verify that the source
MAC address matches the client hardware address in the packet.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Configuring DHCP Features and IP Source Guard
OL-13018-03