H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – ARP
H3C S7500E Series Ethernet Switches Chapter 1 ARP Configuration
1-9
above process. This protects the device against the IP packet attack efficiently,
reducing the load of the CPU.
1.5.2 Enabling ARP Defense Against IP Packet Attack
The ARP defense against IP packet attack function works for forwarded packets and
those originated by the device.
Follow these steps to configure ARP defense against IP packet attack:
To do… Use the command… Remarks
Enter system view
system-view
—
Enable ARP defense
against IP packet attack
arp resolving-route enable
Optional
Enabled by default.
1.6 Displaying and Maintaining ARP
To do… Use the command… Remarks
Display the ARP entries
in the ARP mapping table
display arp { { all | dynamic |
static } [ slot slot-id ] | vlan vlan-id
| interface interface-type
interface-number } [ [ verbose ] [ |
{ begin | exclude | include }
string ] | count ]
Available in any
view
Display the ARP entries
for a specified IP address
display arp ip-address [ slot
slot-id ] [ verbose ] [ | { begin |
exclude | include } string ]
Available in any
view
Display the aging time for
dynamic ARP entries
display arp timer aging
Available in any
view
Display the configuration
information of ARP
source suppression
display arp source-suppression
Available in any
view
Clear ARP entries from
the ARP mapping table
reset arp { all | dynamic | static |
slot slot-id | interface
interface-type interface-number }
Available in user
view
 Note:
Executing the reset arp slot slot-id or the reset arp interface interface-type
interface-number command only removes dynamic ARP entries of the specified slot or
port. To remove specified static ARP entries, you need to use the undo arp ip-address
command.