Output of arping:

# arping 192.168.1.1 -I eth0 
ARPING 192.168.1.1 from 192.168.1.114 eth0
Unicast reply from 192.168.1.1 [00:12:17:05:6F:B0]  1.194ms
Unicast reply from 192.168.1.1 [00:12:17:05:6F:B0]  0.908ms
Unicast reply from 192.168.1.1 [00:12:17:05:6F:B0]  0.964ms
...