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Verification of MAC Address Validation State Inheritance

To verify inheritance of the MAC address validation state on a dynamic subscriber interface, you can use the show ip mac-validate interface command and the show arp command.

The following sample output from the show ip mac-validate interface command displays the MAC address validation state (strict) inherited by the dynamic subscriber interface ip74.39.64.3 from its parent static primary IP interface.

host1#show ip mac-validate interface ip74.39.64.3
ip74.39.64.3:  Strict

        Address       Hardware Addr
        74.39.64.3    0090.1a40.f4f6

Building on this example, the following sample output from the show arp command displays a static MAC address validation entry (74.39.64.3) in the ARP table for the dynamic subscriber interface when it is created with the MAC address validation state inherited from its parent static primary IP interface. The asterisk (*) indicates that the ARP entry was added as the result of issuing an arp validate command rather than an arp command.

host1#show arp
        Address         Age         Hardware Addr    Interface
     10.13.10.1       21600        0090.6939.751b    FastEthernet6/0
     74.39.64.3         -          0090.1a40.f4f6    ip74.39.64.3 *
    192.168.1.2       20700        0090.1a40.280d    FastEthernet8/2

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