Configuring Arp Automatic Scanning And Fixed Arp; Configuration Procedure - HP A6600 Configuration Manual

# Configure ARP restricted forwarding.
[RouterB] vlan 10
[RouterB-vlan10] arp restricted-forwarding enable
[RouterB-vlan10] quit
Then, Router B forwards ARP broadcast requests from Host A to Router A through the trusted port
GigabitEthernet1/0/3, and thus Host B cannot receive such packets. Port isolation works normally.

Configuring ARP automatic scanning and fixed ARP

ARP automatic scanning is usually used together with the fixed ARP feature.
With ARP automatic scanning enabled on an interface, the device automatically scans neighbors on the
interface, sends ARP requests to the neighbors, obtains their MAC addresses, and creates dynamic ARP
entries.
Fixed ARP allows the device to change the existing dynamic ARP entries (including those generated
through ARP automatic scanning) into static ARP entries. The fixed ARP feature effectively prevents ARP
entries from being modified by attackers.
NOTE:
HP recommends that you use ARP automatic scanning and fixed ARP in a small-scale network such as
a cybercafe.

Configuration procedure

To do...
1. Enter system view.
2. Enter interface view.
3. Enable ARP automatic scanning.
4. Return to system view.
5. Enable fixed ARP.
Command...
system-view
interface interface-type interface-number
arp scan [ start-ip-address to end-ip-address ]
quit
arp fixup
431
Remarks
—
—
Required
—
Required