H3C Technologies H3C S6300 Series Switches - Manual (Page 349)

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• To delete a static ARP entry converted from a dynamic one, use the undo arp ip-address 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 Command
1. Enter system view. system-view
2. Enter VLAN interface interface interface-type interface-number
3. Enable ARP scanning. arp scan [ start-ip-address to end-ip-address ]
4. Return to system view. quit
5. Enable fixed ARP. arp fixup
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 Command Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2 Ethernet interface
and Layer 2 aggregate interface
view.
interface interface-type
interface-number
N/A.
3. Enable ARP gateway protection
for the specified gateway.
arp filter source ip-address
By default, ARP gateway
protection is disabled.