on mac
phomlish@i9w 61 % sudo tcpdump –list-interfaces
1.en0 [Up, Running, Wireless, Associated]
2.awdl0 [Up, Running, Wireless, Associated]
3.llw0 [Up, Running, Wireless, Not associated]
4.utun0 [Up, Running]
5.utun1 [Up, Running]
6.utun2 [Up, Running]
7.lo0 [Up, Running, Loopback]
8.en3 [Up, Running, Disconnected]
9.en4 [Up, Running, Disconnected]
10.en1 [Up, Running, Disconnected]
11.en2 [Up, Running, Disconnected]
12.bridge0 [Up, Running, Disconnected]
13.gif0 [none]
14.stf0 [none]
15.XHC1 [none]
16.XHC0 [none]
17.XHC20 [none]
18.VHC128 [none]
19.ap1 [Wireless, Association status unknown]
tcpdump i- en0
tcpdump i- en0