tcpdump -e -r capturefile.pcap ether proto 0x0842 # wake on lan (wol)
11:39:59.577045 00:50:56:b6:6a:ca (oui Unknown) > Broadcast, ethertype Unknown (0x0842), length 116: 
        0x0000:  ffff ffff ffff 1803 73dc 50c6 1803 73dc  ........s.P...s.
        0x0010:  50c6 1803 73dc 50c6 1803 73dc 50c6 1803  P...s.P...s.P...
        0x0020:  73dc 50c6 1803 73dc 50c6 1803 73dc 50c6  s.P...s.P...s.P.
        0x0030:  1803 73dc 50c6 1803 73dc 50c6 1803 73dc  ..s.P...s.P...s.
        0x0040:  50c6 1803 73dc 50c6 1803 73dc 50c6 1803  P...s.P...s.P...
        0x0050:  73dc 50c6 1803 73dc 50c6 1803 73dc 50c6  s.P...s.P...s.P.
        0x0060:  1803 73dc 50c6                           ..s.P.