HP 6125G HP 6125G & 6125G/XG Blade Switches Security Command Reference - Page 275

ARP gateway protection configuration commands, arp filter source

Page 275 highlights

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 arp scan 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. system-view [Sysname] interface vlan-interface 2 [Sysname-Vlan-interface2] arp scan # Configure the device to scan a specific address range for neighbors. 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 View undo arp filter source ip-address Layer 2 Ethernet interface view, Layer 2 aggregate interface view 266

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266
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
arp scan
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
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp scan
# Configure the device 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 interface view, Layer 2 aggregate interface view