Looking for some problems in one of our vast network segments, and came across this little gem that made me chuckle.
----e@host:~ $ sudo tcpdump -envvi em2 arp
*loads of usual junk*
01:56:41.277605 00:c0:69:0b:41:34 ff:ff:ff:ff:ff:ff 0806 60: arp who-has 192.168.1.0 (e3:06:3e:74:40:06) tell 192.168.1.121
01:56:41.277670 00:c0:69:0b:53:e4 ff:ff:ff:ff:ff:ff 0806 60: arp who-has 192.168.1.0 (48:7f:01:bb:67:e2) tell 192.168.1.120
*yet more junk*
02:12:46.370885 00:c0:69:0b:41:34 ff:ff:ff:ff:ff:ff 0806 60: arp who-has 192.168.1.0 (6a:11:12:f2:50:d5) tell 192.168.1.121
02:12:46.370942 00:c0:69:0b:53:e4 ff:ff:ff:ff:ff:ff 0806 60: arp who-has 192.168.1.0 (7f:06:63:17:d1:34) tell 192.168.1.120
*loads more junk*
Surprise! Who has my net? Nevermind the fact that the MAC addresses it seems to believe it's net exists on are non-existent and seem to change a little while later.
That's almost as amusing as the device I saw that was arping for itself a while back. I should try and find that again, don't think it was ever fixed.
Weee...
