Arp Scan - HP 3600 v2 Series Command Reference Manual

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 may be created
(suppose the number is M) and some of the dynamic ARP entries may 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

Syntax
arp scan [ start-ip-address to end-ip-address ]
View
Layer 3 Ethernet interface view, VLAN interface view, Layer 3 aggregate interface view
Default level
2: System level
Parameters
start-ip-address: Specifies the start IP address of the scanning range.
end-ip-address: Specifies the end IP address of the scanning range. The end IP address must be higher
than or equal to the start IP address.
Description
Use the arp scan command to enable ARP automatic scanning in the specified address range for
neighbors.
If the start IP and end IP addresses are specified, the device scans the specific address range for
neighbors and learns their ARP entries, so that the scanning time is reduced. If the specified address
range contains multiple network segments, the sender IP address in the ARP request is the interface
address on the smallest network segment.
If no address range is specified, the device only scans the network where the primary IP address of the
interface resides for neighbors. The sender IP address in the ARP requests is the primary IP address of the
interface.
The start IP address and end IP address must be on the same network as the primary IP address or
manually configured secondary IP addresses of the interface.
IP addresses that already exist in ARP entries are not scanned.
ARP automatic scanning may take some time. To stop an ongoing scan, press Ctrl + C. Dynamic ARP
entries are created based on ARP replies received before the scan is terminated.
Examples
# Configure the device to scan the network where the primary IP address of VLAN-interface 2 resides for
neighbors.
<Sysname> system-view
313