UseIPTRAF to see network traffic statistics.
IPTraf
l Statistics for eth0 qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
x
x Total Total Incoming Incoming Outgoing Outgoing
x Packets Bytes Packets Bytes Packets Bytes
x Total: 96810 258766K 18381 1314690 78429 257451K
x IP: 96810 257398K 18381 1045446 78429 256353K
x TCP: 96539 257357K 18139 1005773 78400 256351K
x UDP: 257 41254 232 39369 25 1885
x ICMP: 6 168 2 56 4 112
x Other IP: 8 248 8 248 0 0
x Non-IP: 0 0 0 0 0 0
x
x
x Total rates: 1563,6 kbytes/sec Broadcast packets: 107
x 514,4 packets/sec Broadcast bytes: 12492
x
x Incoming rates: 8,4 kbytes/sec
x 128,0 packets/sec
x IP checksum errors: 0
x Outgoing rates: 1555,3 kbytes/sec
x 386,4 packets/sec
x
x
x
x Elapsed time: 0:02
x
definitely on this developer boards pps kill CPU