Gathering Statistics About Network Traffic on Flows

Flow statistics help you evaluate packet traffic on any defined flows on the system. To obtain flow information, you use the flowstat command. For more information about this command, refer to the flowstat(1M) man page.

The most commonly used syntax of the flowstat command follows:

# flowstat [-r|-t] [-i interval] [-l link flow]

[-r|-t]: Displays either receive-side statistics only (-r option) or transmit-side statistics only (-t option). If you do not use these options, then statistics for both the receive-side and the transmit-side are displayed.
-i interval: Specifies the time in seconds at which you want the displayed statistics to be refreshed. If you do not use this option, then static output is displayed.
link: Indicates that you want to monitor the statistics for all the flows on the specified datalink. If you do not use this option, then information about all the flows on all the datalinks is displayed.
flow: Indicates that you want to monitor the statistics of a specified flow only. If you do not use this option, then depending on whether you specified a link, all flow statistics are displayed.

How to Obtain Statistics on Flows

Before You Begin

You can use the flowstat command only if flows exist in your network configuration. To configure flows, see Chapter 19, Managing Network Resources.

On the system where you previously configured flow control, become an administrator in the global zone.
For more information, see How to Obtain Administrative Rights in System Administration Guide: Security Services.
For a sampling of how to observe network traffic on flows, perform any of the following commands:
- Display statistics about incoming and outgoing packets on all flows.
```
# flowstat
```
  This command provides a static display of traffic information on all configured flows.
- Display basic network traffic statistics on all flows at a specified interval
```
# flowstat -i interval
```
  The display of statistics is refreshed at the specified interval until you stop the output generation by pressing Control–C.
- Display statistics about incoming packets on all flows that are configured over a specified datalink.
```
# flowstat -r -l link
```
- Display statistics about outgoing packets on a specified flow at a specified interval.
```
# flowstat -t -i interval flow
```

Example 20-8 Displaying Traffic Statistics for All Flows at One-Second Intervals

This example shows information every second about incoming and outgoing traffic on all configured flows on the system.

# flowstat -i 1
FLOW     IPKTS   RBYTES  IERRS    OPKTS  OBYTES  OERRS
flow1  528.45K  787.39M      0  179.39K  11.85M      0
flow2  742.81K    1.10G      0        0       0      0
flow3        0        0      0        0       0      0
flow1   67.73K  101.02M      0   21.04K    1.39M     0
flow2        0        0      0        0       0      0
flow3        0        0      0        0       0      0
...
^C

Example 20-9 Displaying Transmit–Side Statistics for All Flows

# flowstat -t 
 FLOW    OPKTS   OBYTES   OERRS
flow1   24.37M    1.61G       0
flow2        0        0       0
flow1        4      216       0

Example 20-10 Displaying Receive-Side Statistics for All Flows on a Specified Link

This example shows incoming traffic in hardware lanes in all the flows that were created over the net0, the datalink.

# flowstat -r -i 2 -l net0
    FLOW    IPKTS   RBYTES    IERRS
tcp-flow  183.11K  270.24M        0
udp-flow        0        0        0
tcp-flow  373.83K  551.52M        0
udp-flow        0        0        0
tcp-flow  372.35K  549.04M        0
udp-flow        0        0        0
tcp-flow  372.87K  549.61M        0
udp-flow        0        0        0
tcp-flow  371.57K  547.89M        0
udp-flow        0        0        0
tcp-flow  191.92K  282.95M        0
udp-flow  206.51K  310.70M        0
tcp-flow        0        0        0
udp-flow  222.75K  335.15M        0
tcp-flow        0        0        0
udp-flow  223.00K  335.52M        0
tcp-flow        0        0        0
udp-flow  160.22K  241.07M        0
tcp-flow        0        0        0
udp-flow  167.89K  252.61M        0
tcp-flow        0        0        0
udp-flow    9.52K   14.32M        0
^C

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	Oracle Solaris Administration: Network Interfaces and Network Virtualization Oracle Solaris 11 Express 11/10