Configuration Guide     559
Configuring Network Security DHCP Snooping Configuration
Step 8 end
Return to privileged EXEC mode.
Step 9 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable Option 82 on port 1/0/7 and configure the 
strategy as replace, the circuit-id as VLAN20 and the remote-id as Host1:
Switch#configure
Switch(config)#interface gigabitEthernet 1/0/7
Switch(config-if)#ip dhcp snooping information option
Switch(config-if)#ip dhcp snooping information strategy replace
Switch(config-if)#ip dhcp snooping information circut-id VLAN20
Switch(config-if)#ip dhcp snooping information remote-id Host1
Switch(config-if)#show ip dhcp snooping information interface gigabitEthernet 1/0/7
Interface    Option 82 Status   Operation Strategy    Circuit ID           Remote ID                  LAG
---------      ----------------          ------------------            -------------       -----------------        -----
Gi1/0/7       Enable                        Replace                           VLAN20             Host1                         N/A
Switch(config-if)#end
Switch#copy running-config startup-config