Router ~ # vnstat -h
 eth0                                                                     12:20 
  ^                             r                                               
  |                             r  r                                            
  |                             r  r                                            
  |                             r  r                                            
  |                             r  r                                            
  |                             r  r                                            
  |                             r  r                                            
  |  r           r              r  r     r                                      
  |  r           r              r  r  r  r  r  r                    r           
  |  r           r           r  r  r  r  r  r  r  r  r  r  r  r  r  r           
 -+---------------------------------------------------------------------------> 
  |  13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12    
                                                                                
 h   rx (kB)    tx (kB)      h   rx (kB)    tx (kB)      h   rx (kB)    tx (kB) 
13    270,607      1,625    21     91,666     32,179    05    138,760     47,405
14          0          0    22    786,889     67,728    06    132,195     52,330
15     15,224      3,464    23    761,719     63,607    07    140,738     52,558
16      4,938      1,549    00    185,804     49,849    08    141,004     47,495
17    311,135      9,507    01    296,241     50,723    09    150,444     50,177
18      5,622      1,685    02    224,345     40,572    10    167,131     57,411
19     24,317     21,956    03    167,804     41,797    11     16,319     56,645
20     30,499     24,972    04    146,208     52,193    12      4,626     19,086
Router ~ #