Network Troubleshooting Tools

Network Measurement Tools

The easiest way to install the most up-to-date version of several useful network test tools is from the software repo:

RHEL-based systems:

  rpm -hUv
yum -y install perfsonar-tools

Debian "wheezy" and Ubuntu "Precise" -based systems, you can do (more info):

    cd /etc/apt/sources.list.d/
wget wget -qO - | apt-key add apt-get update apt-get install perfsonar-tools

OSX systems  (install homebrew)

   brew install iperf iperf3 nuttcp bwctl owamp

Note: Be sure to tune your hosts TCP settings, as described here.

Measurement Tool
bwctl schedules tests, one at a time (wrapper for iperf and nuttcp)
iperf /iperf3 measures end-to-end TCP/UDP performance
nuttcp measures end-to-end TCP/UDP performance
owamp measures latency, loss, and jitter
traceroute / scamper measures the network path and MTU
pathrate/pathload measures available bandwidth and capacity
UDPmon Network performance measurement tool
synack offers replacement ping for sites that block icmp

Network Testing Tools

Testing Tool
NDT/NPAD: Web100-based Network Test Tools provides testing for a wide range of network trouble-areas
tcpdump dumps all TCP header information for a specified source/destination
tcptrace formats tcpdump output for analysis using xplot