Arp Scan - H3C MSR Series Command Reference Manual

Dynamic ARP entries that are aged out during the conversion are not converted to static ARP
entries.
To delete a 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 trigger an ARP scanning in an address range.
Syntax
arp scan [ start-ip-address to end-ip-address ]
Views
Layer 3 Ethernet interface/subinterface view
Layer 3 aggregate interface/subinterface view
VLAN interface view
Predefined user roles
network-admin
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.
Usage guidelines
ARP scanning automatically creates ARP entries for devices in the specified address range. IP
addresses already in existing ARP entries are not scanned.
If the interface's primary and secondary IP addresses are in the address range, the sender IP
address in the ARP request is the address on the smallest network segment.
If no address range is specified, the device learns ARP entries for devices on the subnet where the
primary IP address of the interface resides. The sender IP address in the ARP requests is the
primary IP address of the interface.
The start and end IP addresses must be on the same subnet as the primary IP address or secondary
IP addresses of the interface.
ARP scanning will 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 neighbors on the network where the primary IP address of
GigabitEthernet 1/0/1 resides.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] arp scan
# Configure the device to scan neighbors in an address range.
1119