Configuration Procedure; Configuring Arp Gateway Protection - HP 6600 Security Configuration Manual

The number of static ARP entries changed from dynamic ARP entries is restricted by the number of
•
static ARP entries that the device supports. As a result, the device might fail to change all dynamic
ARP entries into static ARP entries.
• To delete a specific static ARP entry changed from a dynamic one, use the undo arp ip-address
[ vpn-instance-name ] command. To delete all such static ARP entries, use the reset arp all or reset
arp static command.

Configuration procedure

To configure ARP automatic scanning and fixed ARP:
Step
1. Enter system view.
2. Enter interface view.
3. Enable ARP automatic scanning.
4. Return to system view.
5. Enable fixed ARP.

Configuring ARP gateway protection

NOTE:
This feature is supported only when SAP modules operate in bridge mode.
Configure this feature on interfaces not connected with the gateway to prevent gateway spoofing attacks.
When such a port 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.
Follow these guidelines when you configure ARP gateway protection:
You can enable ARP gateway protection for up to eight gateways on a port.
•
Commands arp filter source and arp filter binding cannot be both configured on a port.
•
• If ARP gateway protection works with ARP detection and ARP snooping, ARP gateway protection
applies first.
To configure ARP gateway protection:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet interface
view.
3. Enable ARP gateway protection
for a specific gateway.
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
arp filter source ip-address
524
Remarks
N/A
N/A
Disabled by default.