So, I mentioned earlier that I have packet loss on the uplink from my Web server where GrabPERF and this blog are hosted. How do I know it’s packet loss and not some other issue?


Notice the banding of measurements around 3 and 9 seconds? These values are the set TCP re-transmission timeouts for new connections for almost every operating system. When you see this pattern, check your packet loss stats from your routers/switches/network equipment.
Now…I wonder what my connectivity provider has mucked up?