capstats - print statistics about the current load on a network interface

       capstats was written by Robin Sommer <robin@icir.org>

       This manual page was written by Justin Azoff <JAzoff@uamail.albany.edu>, for the Debian project (but  may
       be used by others).

                                                January 15, 2010                                     CAPSTATS(8)

       This manual page documents briefly the capstats command.

       capstats is a program that prints statistics about the current load on a network interface using libpcap.
       It reports statistics per time interval and/or for the tool's total run-time.

       Here's an example output with output in one-second intervals until CTRL-C is hit:

       >capstats -i eth0 -I 1
       1186620936.890567 pkts=12747 kpps=12.6 kbytes=10807 mbps=87.5 nic_pkts=12822 nic_drops=0 u=960 t=11705
       i=58 o=24 nonip=0
       1186620937.901490 pkts=13558 kpps=13.4 kbytes=11329 mbps=91.8 nic_pkts=13613 nic_drops=0 u=1795 t=24339
       i=119 o=52 nonip=0
       1186620938.912399 pkts=14771 kpps=14.6 kbytes=13659 mbps=110.7 nic_pkts=14781 nic_drops=0 u=2626 t=38154
       i=185 o=111 nonip=0
       1186620939.012446 pkts=1332 kpps=13.3 kbytes=1129 mbps=92.6 nic_pkts=1367 nic_drops=0 u=2715 t=39387
       i=194 o=112 nonip=0
       === Total
       1186620939.012483 pkts=42408 kpps=13.5 kbytes=36925 mbps=96.5 nic_pkts=1 nic_drops=0 u=2715 t=39387 i=194
       o=112 nonip=0

       capstats - print statistics about the current load on a network interface

       These  programs  follow  the  usual  GNU  command line syntax, with long options starting with two dashes
       (`-').  A summary of options is included below.

       -i,--interfaceinterface
              Listen on interface-d,--dag
              Use native DAG API if capstats was built with DAG support.

       -f,--filterfilter
              BPF filter

       -I,--intervalsecs
              Stats logging interval

       -l,--syslog
              Use syslog rather than print to stderr

       -n,--numbercount
              Stop after outputting count intervals

       -p,--payloadn
              Verifies that packets' payloads consist entirely of bytes of the given value.

       -q,--quietcount
              Suppress output, exit code indicates >= count packets received.

       -S,--sizesize
              Verify packets to have given size

       -s,--snaplensize
              Use pcap snaplen size-v,--version
              Print version and exit

       -w,--writefilename
              Write packets to filename

tcpdump(8),

capstats [ options ] -i interface