Onnowpurbo at 03:01, 2 July 2019

2019-07-02T03:01:20Z

← Older revision		Revision as of 03:01, 2 July 2019
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	echo "TX $1: $TXPPS pkts/s RX $1: $RXPPS pkts/s"		echo "TX $1: $TXPPS pkts/s RX $1: $RXPPS pkts/s"
	done		done

			Usage:

			netpps.sh enp3s0



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	done		done


			Usage:

			netspeed.sh enp3s0

Onnowpurbo: Created page with "Sumber: http://xmodulo.com/measure-packets-per-second-throughput-high-speed-network-interface.html Last updated on November 6, 2013 Authored by Dan Nanni 12 Comments There a..."

2019-07-02T02:58:05Z

Created page with "Sumber: http://xmodulo.com/measure-packets-per-second-throughput-high-speed-network-interface.html Last updated on November 6, 2013 Authored by Dan Nanni 12 Comments There a..."

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Sumber: http://xmodulo.com/measure-packets-per-second-throughput-high-speed-network-interface.html

Last updated on November 6, 2013 Authored by Dan Nanni 12 Comments

There are many traffic monitoring tools available on Linux, which can monitor/classify network traffic, and report real-time traffic statistics in fancy user interfaces. Most of these tools (e.g., ntopng, iftop) are powered by libpcap, which is a packet capture library used to monitor network traffic in user space. Despite their versatility, however, libpcap-based network monitoring tools cannot scale to handle traffic on multi Gigabit rate network interfaces, due to the overhead associated with user-space packet capture.

In this tutorial, I will present simple shell scripts that can monitor network traffic on per-interface basis, without relying on slow libpcap library. These scripts are fast enough to support multi Gigabit rates, but only suitable if you are interested in "aggregate" network statistics on per interface basis.

The secret for the scripts lies in sysfs virtual filesystem which is used by the kernel to export device- or driver-related information to user space. Network interface related statistics are exported via /sys/class/net/<ethX>/statistics.

For example, the statistics on eth0 interface are found in these files:

/sys/class/net/eth0/statistics/rx_packets: number of packets received
/sys/class/net/eth0/statistics/tx_packets: number of packets transmitted
/sys/class/net/eth0/statistics/rx_bytes: number of bytes received
/sys/class/net/eth0/statistics/tx_bytes: number of bytes transmitted
/sys/class/net/eth0/statistics/rx_dropped: number of packets dropped while received
/sys/class/net/eth0/statistics/tx_dropped: number of packets dropped while transmitted

The numbers stored in the files are automatically refreshed in real-time by the kernel. Therefore, you can write scripts that calculate traffic statistics based on these files.

The following are two such scripts (thanks to joemiller). The first script counts the number of packets per second, received (RX) or sent (TX) on an interface, while the latter scripts measures the network bandwidth of incoming (RX) and outgoing (TX) traffic on an interface. For these scripts to work, you do not need to install anything.

Measure Packets per Second on an Interface

#!/bin/bash

INTERVAL="1" # update interval in seconds

if [ -z "$1" ]; then
echo
echo usage: $0 [network-interface]
echo
echo e.g. $0 eth0
echo
echo shows packets-per-second
exit
fi

IF=$1

while true
do
R1=`cat /sys/class/net/$1/statistics/rx_packets`
T1=`cat /sys/class/net/$1/statistics/tx_packets`
sleep $INTERVAL
R2=`cat /sys/class/net/$1/statistics/rx_packets`
T2=`cat /sys/class/net/$1/statistics/tx_packets`
TXPPS=`expr $T2 - $T1`
RXPPS=`expr $R2 - $R1`
echo "TX $1: $TXPPS pkts/s RX $1: $RXPPS pkts/s"
done

Measure Network Bandwidth on an Interface

#!/bin/bash

INTERVAL="1" # update interval in seconds

if [ -z "$1" ]; then
echo
echo usage: $0 [network-interface]
echo
echo e.g. $0 eth0
echo
exit
fi

IF=$1

while true
do
R1=`cat /sys/class/net/$1/statistics/rx_bytes`
T1=`cat /sys/class/net/$1/statistics/tx_bytes`
sleep $INTERVAL
R2=`cat /sys/class/net/$1/statistics/rx_bytes`
T2=`cat /sys/class/net/$1/statistics/tx_bytes`
TBPS=`expr $T2 - $T1`
RBPS=`expr $R2 - $R1`
TKBPS=`expr $TBPS / 1024`
RKBPS=`expr $RBPS / 1024`
echo "TX $1: $TKBPS kB/s RX $1: $RKBPS kB/s"
done

==Referensi==

* http://xmodulo.com/measure-packets-per-second-throughput-high-speed-network-interface.html

Internet Offline: IPv6 pps measurement - Revision history

Onnowpurbo at 03:01, 2 July 2019

Onnowpurbo: Created page with "Sumber: http://xmodulo.com/measure-packets-per-second-throughput-high-speed-network-interface.html Last updated on November 6, 2013 Authored by Dan Nanni 12 Comments There a..."