HP 6125G HP 6125G & 6125G/XG Blade Switches Security Configuration Gui - Page 259
Configuration procedure, Configuring ARP gateway protection, Configuration guidelines
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• 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. Command system-view interface interface-type interface-number arp scan [ start-ip-address to end-ip-address ] quit arp fixup 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 Remarks N/A N/A 249