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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
# Convert existing dynamic ARP entries to static ARP entries.
<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 view
Layer 3 Ethernet subinterface view
Layer 3 aggregate interface view
Layer 3 aggregate subinterface view
VSI interface view
VLAN interface view
Predefined user roles
network-admin
mdc-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 the neighbors on the network where the primary IP address of
VLAN-interface 2 resides.
<Sysname> system-view
[Sysname] interface vlan-interface 2
