1

I cannot get arping to run if I give a MAC address. If I use IP address, it works fine.

Does anybody know what the problem is?

1.

arping -i <ifname> xx:xx:xx:xx:xx:xx
arping: Unable to get the IPv4 address of interface <ifname>:
arping: libnet_get_ipaddr4(): ioctl(): Cannot assign requested address
arping: Use -S to specify address manually.

2.

arping -i brlan xx:xx:xx:xx:xx:xx
arping: libnet_init(LIBNET_LINK, brlan): libnet_check_iface() ioctl: No such device
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  • 3
    arping takes an IP address as a parameter, not a MAC address.
    – Ron Trunk
    Oct 20, 2016 at 13:27
  • 1
    @RonTrunk portable Arping works with both. iputils-arping only works with IP addresses. Author obviously uses portable arping (key givaway is mention of libnet. iputils-arping doesn't use libnet)
    – Thomas
    Oct 20, 2016 at 15:06
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer.
    – Ron Maupin
    Aug 15, 2017 at 4:30

1 Answer 1

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  1. In order for arping to be able to send an ICMP echo request (what it does when pinging MAC addresses) it needs to put in a source address in that IP packet. The error message says that the <ifname> interface has no IP address. Your options are to give it one, or do what it says and use -S.

  2. libnet (and therefore arping) thinks that the interface brlan doesn't exist. Are you sure that it does? (run ip l l)

If the interface in (1) has an address, or you do have an interface called brlan, then file a bug with how to reproduce at https://github.com/ThomasHabets/arping/issues

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