User Guide    714
Configuring DHCP Filter Configuration Examples
4.2.4  Using the CLI
1)  Enable DHCPv6 Filter globally and on all pots:
Switch_A#configure
Switch_A(config)#ipv6 dhcp filter
Switch_A(config)#interface range fastEthernet 1/0/1-24
Switch_A(config-if-range)#ip dhcpv6 filter
Switch_A(config)#interface range gigabitEthernet 1/0/25-28
Switch_A(config-if-range)#ip dhcpv6 filter
Switch_A(config-if-range)#exit
2)  Create an entry for the legal DHCPv6 server:
Switch_A(config)#ipv6 dhcp filter server permit-entry server-ip 2001::54 interface 
fastEthernet 1/0/1
Switch_A(config)#end
Switch_A#copy running-config startup-config
Verify the Configuration
Verify the global DHCPv6 Filter configuration:
Switch_A#show ipv6 dhcp filter
Global Status: Enable
Verify the DHCPv6 Filter configuration on ports:
Switch_A#show ipv6 dhcp filter interface
Interface    state               Limit-Rate      Dec-rate       LAG
---------       -------             ----------          --------           ---
Fa1/0/1       Enable             Disable            Disable          N/A
Fa1/0/2       Enable             Disable            Disable          N/A
Fa1/0/3       Enable             Disable            Disable          N/A
Fa1/0/4       Enable             Disable             Disable         N/A
...
Verify the legal DHCPv6 server configuration:
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