Huawei S9300 Configuration Manual page 26

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service
3.
As shown in
the arp-ping ip command on Switch A to check whether the IP address 10.1.1.2 is in use.
Figure 2-1 Implementation procedure of ARP-Ping IP
Host B
10.1.1.3/32
Run the arp-ping ip 10.1.1.2 command on Switch A. After receiving the ARP Reply packet
from Host A 10.1.1.2 on the network, Switch A displays the MAC address of Host A.Switch A
displays the MAC address of Node B.
Through the command output, you can know whether the IP address is used by another host on
the network.
Introduction to ARP-Ping MAC
ARP-Ping MAC uses ICMP packets to check whether a MAC address is used by another device
on the LAN.
When you know a specific MAC address on a network segment but do not know the
corresponding IP address, you can obtain the IP address corresponding to the MAC address by
sending the broadcast Internet Control Messages Protocol (ICMP) packets through ARP-Ping
MAC. In this way, you can query the IP address corresponding to the specific MAC address on
the network segment.
Principles of ARP-Ping MAC
ARP-Ping MAC sends broadcast ICMP Echo Request packets. The following describes how to
implement ARP-Ping MAC:
Issue 01 (2012-03-15)
After receiving the ARP Reply packet, the source device compares the source IP address
contained in the Reply packet with the IP address input in the command line. If they are
consistent, the MAC address corresponding to the input IP address is displayed and the
timeout timer of ARP Reply packets is disabled. The operation finishes.
If the timeout timer of ARP Reply packets times out, it means that the IP address is not in
use.
Figure 2-1, Switch A and Gigabitethernet A are directly connected. You can run
Host A
10.1.1.2/32
GE1/0/0
10.1.1.1/24
Gigabitethernet A
NOTE
The arp-ping ip command is applicable to the outgoing interface in one of the following types: the Ethernet
interface, Gigabit Ethernet interface, Eth-Trunk interface, VLANIF interface, and member interface of the
VLANIF interface (including the Layer 2 interfaces into which these interfaces are switched).
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SwitchA
2 ARP Configuration
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