R3303-HP HSR6800 Routers Security Command Reference

491
ARP automatic scanning and fixed ARP
configuration commands
arp fixup
Use arp fixup to change the existing dynamic ARP entries into static ARP entries. You can use this
command again to change the dynamic ARP entries learned later into static.
Syntax
arp fixup
Views
System view
Default command level
2: System level
Usage guidelines
The static ARP entries changed from dynamic ARP entries have the same attributes as the manually
configured static ARP entries.
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.
Suppose that the number of dynamic ARP entries is D and that of the existing static ARP entries is S.
When the dynamic ARP entries are changed into static, new dynamic ARP entries might be created
(suppose the number is M) and some of the dynamic ARP entries might be aged out (suppose the number
is N). After the process is complete, the number of static ARP entries is D + S + M – N.
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.
Examples
# Enable Fixed ARP.
<Sysname> system-view
[Sysname] arp fixup
arp scan
Use arp scan to enable ARP automatic scanning in the specified address range for neighbors.
Syntax
arp scan [ start-ip-address to end-ip-address ]
Views
Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view, VLAN interface view, Layer 3
aggregate interface view, Layer 3 aggregate sub-interface view