Configuration Procedure; Configuring Arp Gateway Protection; Configuration Guidelines - HP 5920 Series Configuration Manual

To delete a static ARP entry converted from a dynamic one, use the undo arp ip-address
•
[ vpn-instance-name ] command. Use the reset arp all command to delete all ARP entries or the
reset arp static command to delete all static ARP entries.

Configuration procedure

To configure ARP scanning and fixed ARP:
Step
1. Enter system view.
2. Enter Layer 3 Ethernet interface/Layer 3
Ethernet subinterface/VLAN
interface/Layer 3 aggregate
interface/Layer 3 aggregate subinterface
view.
3. Enable ARP scanning.
4. Return to system view.
5. Enable fixed ARP.

Configuring ARP gateway protection

Configure this feature on interfaces not connected with a gateway to prevent gateway spoofing attacks.
When such an interface receives an ARP packet, it checks whether the sender IP address in the packet is
consistent with that of any protected gateway. If yes, it discards the packet. If not, it handles the packet
correctly.

Configuration guidelines

Follow these guidelines when you configure ARP gateway protection:
You can enable ARP gateway protection for a maximum of eight gateways on an interface.
•
Do not configure both the arp filter source and arp filter binding commands on an interface.
•
If ARP gateway protection works with ARP detection, MFF, and ARP snooping, ARP gateway
•
protection applies first.
Configuration procedure
To configure ARP gateway protection:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet interface
and Layer 2 aggregate interface
view.
Command
system-view
interface interface-type interface-number
arp scan [ start-ip-address to end-ip-address ]
quit
arp fixup
Command
system-view
interface interface-type
interface-number
341
Remarks
N/A
N/A.