Configuration Procedure; Configuring Arp Gateway Protection; Configuration Guidelines - HP 6125G 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 may 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

The ARP gateway protection feature, if configured on ports not connected with the gateway, can block
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
normally.

Configuration guidelines

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, 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
view/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
249
Remarks
N/A
N/A