Strange network traffic

Hi all,
do you recognize this kind of ethernet traffic? This is the output (repeated over and over) from tcpdump

17:15:59.702633 01:80:c2:00:00:01 > 01:80:c2:00:00:01, ethertype Unknown (0x8808), length 60: 
        0x0000:  0001 ffff 0000 0000 0000 0000 0000 0000  ................
        0x0010:  0000 0000 0000 0000 0000 0000 0000 0000  ................
        0x0020:  0000 0000 0000 0000 0000 0000 0000       ..............