Deploying High Performance Wi-Fi and Optimizing Your Entire Network

Executive Summary Wi-Fi networks are the most volatile because they’re subject to external factors that are the most difficult to control. RF interference, fading, or channel access conflict driven by a sudden increase in users can induce jitter that causes throughput...

Quality of Service (QoS)

Why it Matters, Why Your Network Can’t Always Deliver it, and How to Ensure It Does Executive Summary Network QoS (Quality of Service) has been defined as the ability of a network to deliver the level of performance required for business-critical applications to meet...

Network Testing & Debugging – Intro to PCAP Analysis

Whenever you are setting up a network, changing a network, or optimizing a network, things always end up going wrong. When things aren’t working as expected, the best thing you can do is to take a packet capture (pcap) and look at what’s actually going on....

9 Sets of Sample tc Commands to Simulate Common Network Scenarios

Let’s say you want to set up a test network. You have your client, your server, your device under test (in our case, our WarpTCP proxy), and one or two tc boxes. The tc boxes are just little linux boxes with bridged interfaces set up to forward traffic. Plus we...

Performance Testing with cURL, Part 2: Scripting

This is part 2 of a series. Click here to read part 1. Parallel cURL Testing To perform multiple curl transfers in parallel, we need to look at another tool: xargs. If you aren’t familiar with xargs, it is a very powerful linux utility.  With it, we can execute...

Performance Testing with cURL, Part 1: Basics

Overview The cURL program is widely available across many different platforms, which makes it an obvious choice for network testing. It is simple, scriptable, and flexible – which is why it is so powerful. It supports many protocols, but we are going to focus on HTTP...