How to flush the ARP cache in various OS (Windows, Linux, AIX)

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ARP (Address Resolution Protocol is the standard method for finding a host’s hardware address when only its network layer address is known.
For all systems, the common way is to reboot but it is not always necessary or possible.

Windows:
Open cmd.exe and execute the following command:
netsh interface ip delete arpcache
In order to verify before and after the arp table, you can use:
arp -a

Linux:
# ip -s -s neigh flush all

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