KB.15.15

Displaying ARP Packet Statistics

To display statistics about forwarded ARP packets, dropped ARP packets, MAC validation failure,

and IP validation failures, enter the show arp-protect statistics <vid-range>command:

Figure 264 Show arp-protect statistics Command

Monitoring Dynamic ARP Protection

When dynamic ARP protection is enabled, you can monitor and troubleshoot the validation of ARP

packets with the debug arp-protect command. Use this command when you want to debug the

following conditions:

• The switch is dropping valid ARP packets that should be allowed.

• The switch is allowing invalid ARP packets that should be dropped.

Figure 265 Debug arp-protect command

Listing authorized and detected MAC addresses

Syntax:

show mac-address [ port-list | mac-address | vlan vid]

Without an optional parameter, show mac-address lists the authorized MAC

addresses that the switch detects on all ports.

mac-address

Lists the specified MAC address with the port on which it is detected as an authorized

address.

port list

Lists the authorized MAC addresses detected on the specified port(s).

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