Nice tool

Some really nice tool nicstat I found on Open Solaris mailing list which gives you nice info about your network interfaces utilization. For example:

 $ nicstat 1

     Time   Int   rKb/s   wKb/s   rPk/s   wPk/s    rAvs    wAvs   %Util     Sat

 12:33:04  hme0    1.51    4.84    7.26   10.32  213.03  480.04    0.05    0.00

 12:33:05  hme0    0.20    0.26    3.00    3.00   68.67   90.00    0.00    0.00

 12:33:06  hme0    0.14    0.26    2.00    3.00   73.00   90.00    0.00    0.00

 12:33:07  hme0    0.14    0.52    2.00    6.00   73.00   88.00    0.01    0.00

 12:33:08  hme0    0.24    0.36    3.00    4.00   81.33   92.00    0.00    0.00

 12:33:09  hme0    2.20    1.77   16.00   18.00  140.62  100.72    0.03    0.00

 12:33:10  hme0    0.49    0.58    8.00    9.00   63.25   66.00    0.01    0.00

 12:33:11  hme0   12.16 1830.38  185.06 1326.42   67.26 1413.06   15.09    0.00

 12:33:12  hme0   19.03 3094.19  292.88 2229.11   66.53 1421.40   25.50    0.00

 12:33:13  hme0   19.55 3151.87  301.00 2270.98   66.50 1421.20   25.98    0.00

 12:33:14  hme0   11.99 1471.67  161.07 1081.45   76.25 1393.49   12.15    0.00

 12:33:15  hme0    0.14    0.26    2.00    3.00   73.00   90.00    0.00    0.00

 [...]

Just download nicstat written in Perl or nicstat written in C