328
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 switch 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 switch 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 switch to scan the network where the primary IP address of VLAN-interface 2 resides for
neighbors.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp scan
# Configure the switch to scan a specific address range for neighbors.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp scan 1.1.1.1 to 1.1.1.20
ARP gateway protection configuration commands
arp filter source
Syntax
arp filter source ip-address
undo arp filter source ip-address
View
Layer 2 Ethernet port view, Layer 2 aggregate interface view
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