If this is the case, the arping needs to know the network interface it needs to use in order to send the ARP ping.Īs you can see, the arping command will try to “ guess” the network interface if it is not provided with one. If you were to deal with a router, or if you chose to install your Linux server as a router, two network interface cards can be installed in order to route to two different networks. This is quite normal because the arping command expects a network interface to be specified. If the arping command is not able to resolve the IP address of the target defined, you will get an ARP timeout.Īs an example, executing an ARP request on an unknown host would give you the following output $ arping -c 5 Īs you can see, in some cases, you will be presented with a warning if you don’t specify any network interface. Awesome, you successfully used the arping command in order to issue ARP requests over the network! ARP timeouts using arping
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