Displaying Network Traffic Statistics of Flows

Statistics on flows help you to evaluate packet traffic on all the defined flows on a system.To display the statistics on flows, use theflowstat command. For moreinformation, see theflowstat(8) man page.

Use the following command syntax to display network traffic statistics on flows:

$flowstat [-r|-t] [-llink] \[-Tu | -Td] [flow] [interval [count]]

–r

Displays receive-side network traffic statistics only. You should not specify the–t option with this option.

If you do not specify the–r option or–t option, both thetransmit-side and receive-side network statistics are displayed.

–t

Displays transmit-side network traffic statistics only. You should not the specify the–r option with this option.

If you do not specify the–r option or the–t option, both thetransmit-side and receive-side network statistics are displayed.

–llink

Name of the datalink whose network statistics you want to monitor. If you do not specify thedatalink, then the information about all the configured flows on the system are displayed.

–Tu

Displays the current time in internal representation.

–Td

Displays the current time in standard date format.

flow

Name of the flow whose network statistics you want to monitor. If you do not specify the flow,then depending on the specified link, all the flow statistics are displayed.

interval

Specifies the time in seconds at which you want to refresh the network statistics. If you donot specify the interval value, then the total number of packets and bytes is displayed.

count

Specifies the number of times you want the displayed network traffic statistics to berefreshed. If you do not specify the count value, the statistics are refreshed indefinitely.

The following examples show different ways to display information about configured flows onthe system.

Example 102  Displaying Network Traffic Statistics for Flows

In this example, network traffic statistics for all the configured flows on the system aredisplayed with an interval value of1 second and the count value of2.

$flowstat 1 2FLOW     IPKTS   RBYTES   IDROPS    OPKTS   OBYTES   ODROPSflow1    1.78M    2.68G      443  889.57K   58.72M        0flow2        0        0        0        0        0        0flow1    8.31K   12.51M      243    4.22K  280.45K        0flow2        0        0        0        0        0        0

Consider the flows,flow1 andflow2, as a set. The firstset of flows,flow1 andflow2, show the total number ofnetwork traffic statistics received and transmitted by the flows. In this example,1.78M is the total number of packets received byflow1. Thesecond set of flows,flow1 andflow2, show the networkstatistics in rates per second, also known as the normalized value. In this example,8.31K is the normalized value of the packets received byflow1in the interval of1 second.

Example 103  Displaying Transmit-Side Traffic Statistics for Flows

In this example, the network traffic statistics about outgoing traffic for all the configuredflows on the system are displayed.

$flowstat -tFLOW     OPKTS   OBYTES   ODROPSflow1   24.37M    1.61G        0flow2        0        0        0

Example 104  Displaying Receive-Side Traffic Statistics for Flows on a Datalink

In this example, incoming network traffic for all the configured flows on the datalinknet0 are displayed with an interval value of2 seconds and thecount value of5.

$flowstat -r -l net0 2 5FLOW     IPKTS   RBYTES   IDROPSflow1    2.38M    3.59G   14.89Kflow2        0        0        0flow1    8.24K   12.40M      180flow2        0        0        0flow1    8.94K   13.47M      206flow2        0        0        0flow1    7.43K   11.19M      161flow2        0        0        0flow1    8.38K   12.62M      213flow2        0        0        0

Consider the flows,flow1 andflow2, as a set. The firstset of flows,flow1 andflow2, show the total number ofpackets and bytes received by the flows. In this example,2.38M is the totalnumber of packets received and3.59G is the total number of bytes received byflow1. The second set of flows,flow1 andflow2, show the network statistics in rates per second, also known as thenormalized value. In this example,8.24K is the normalized value of the packetsreceived byflow1 in the interval of2 seconds. Similarly, thesucceeding sets of flows also show the normalized value for the network traffics statistics in theperiodic interval of2 seconds.

Example 105  Displaying Traffic Statistics for Flows With Time

The following example displays statistics about incoming traffic on all the flows that arecreated over the datalinknet0 with the internal representation of the currenttime.

$flowstat -r -l net0 -Tu1364380279          FLOW        IPKTS   RBYTES    IDROPS          tcp-flow  183.11K  270.24M        0          udp-flow        0        0        0

The following example displays statistics about incoming traffic on all the flows that arecreated over the datalinknet0 with the current time in standard dateformat.

$flowstat -r -l net0 -TdWednesday, March 27, 2013 04:01:011 PM IST          FLOW        IPKTS   RBYTES    IDROPS          tcp-flow  183.11K  270.24M        0          udp-flow        0        0        0