Avoid Traffic Headaches on the Road and in your Network

Traffic congestion on the way to work is a sure way to get an immediate headache. That is why I’m a big fan of viewing live traffic patterns from my smart phone. I get a live view of traffic that shows which routes are congested and clear. With this information, I arrive at the office much faster and in a better state of mind (my co-workers agree).

Wouldn’t it be nice if finding congestion in network traffic was as simple as flipping on your smartphone and pressing a couple of buttons? Maybe someday. In the mean time, to make life as simple as possible, I use dopplerVUE which has Netflow built in, so I can look deep into routers and capture rich details about what types of traffic, which IPs are talking and how much bandwidth is being used. Take a look at dopplerVUE in action below. You can try it out free for 30 days.

If you don’t have access to tools like dopplerVUE, there are free tools that can help you as long as you’re willing to invest the time.


There are basically two types of techniques to monitor congestion - packet monitoring and packet capturing. I’ve listed some free tools for both methods below.

Packet Monitoring
Packet monitors watch the number of packets whizzing by and tell you a little bit of information about them, such as the number of packets and if there are any errors in the packet. But that is about it, you don’t get much more detail. So this method is good for watching long term trends.


1) For Windows users, look at the network interface properties. The display shows you packets sent and received. This is an easy way to see if your interface is working.

2) The Windows command line provides a number of useful tools to determine the performance of your TCP/IP connection. The Netstat command can give you details about each TCP connection including how many packets have been processed. Below is the result of a netstat –e command.

A list of the most common communications related commands available for the Windows command line are listed below:

Packet Capturing
Packet capture actually stores a copy of each packet that comes by which allows you to look at all characteristics of the packet. But all this detail comes with a down side - it will eat up storage space very quickly. So this method is best to capture a small sample of traffic for deep analysis.


1) For packet capture, the gold standard for open source tools is Wireshark. Here is a screenshot of a packet capture done with Wireshark on my laptop. As you can see, every packet is listed with full details about source and destination address, protocol type and data contents.

Wireshark is one of many open source tools that leverage the Winpcap tool for network monitoring. A list of tools that use Winpcap can be found here.


2) Windows server users have access to a similar tool called Network Monitor that helps monitor network traffic. Below is a screenshot of Network Monitor in action.

I hope these tools help you avoid congestion on your way to work and in your network.