Configuration Guide     694
Configuring DHCP Filter DHCPv6 Filter Configuration
Step 2 ipv6 dhcp filter server permit-entry server-ip 
ipAddr
 interface { fastEthernet
 port-list 
| 
gigabitEthernet
 port-list 
| ten-gigabitEthernet
 port-list 
| port-channel 
port-channel-id
 } 
Create an entry for the legal DHCPv6 server.
 
ipAddr
: Specify the IPv6 address of the legal DHCPv6 server.
port-list
 | 
port-channel-id
: Specify the port that the legal DHCPv6 server is connected to.
Step 3 show ip dhcp filter server permit-entry
Verify configured legal DHCPv6 server information.
Step 4 end
Return to privileged EXEC mode.
Step 5 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to create an entry for the legal DHCPv6 server whose 
IPv6 address is 2001::54 and connected port number is 1/0/1:
Switch#configure
Switch(config)#ipv6 dhcp filter server permit-entry server-ip 2001::54 interface 
gigabitEthernet 1/0/1
Switch(config)#show ipv6 dhcp filter server permit-entry
Server IP                  Interface
----------------        ---------
2001::54                  Gi1/0/1
Switch(config)#end
Switch#copy running-config startup-config