R2511-HP MSR Router Series Security Command Reference(V5)

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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
If you specify the start IP and end IP addresses, 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 you do not specify an address range, 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 already exist in ARP entries are not scanned.
ARP automatic scanning might 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 Ethernet 1/1 resides for
neighbors.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] arp scan
# Configure the device to scan the specific address range for neighbors.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] arp scan 1.1.1.1 to 1.1.1.20