I've been working on diagnosing wireless issues from a Raspberry Pi for almost a year now. And after writing a bunch of python around packet capture and upload I was searching for some airtime calculations when I stumbled across a piece of software called HORST. Standing for Highly Optimized Radio Scanning Tool, HORST allows you to analyze wireless statistics and packets in real time. In just a few minutes, I had it running and was amazed at how well it can analyze a network remotely.
Sunday, September 27, 2015
For those of you who don't know, Aruba has been pretty generous with the TechFieldDay delegates over the last few years. They are a great contributor to the community, even giving away hardware and software at wireless industry events like #WifiTrek and #WLPC. And with #WFD8, we're heading back to Aruba to hear what's new.
Thursday, September 10, 2015
Shortly after #WFD7, I decided to sit down and do some testing with RX-SOP. During a lazy Saturday afternoon in the lab, I was testing this "dangerous" feature to determine why there was so much hesitation about using this feature.
And shortly after starting on my testing, things started to go horribly wrong. I had gotten too aggressive with the setting and my test clients had "hit the wall." Meaning that my clients dropped below the RX-SOP threshold and the AP was no longer responding to it.
Tuesday, February 10, 2015
I'd like to start with the fact that I am an RRM guy. I think Radio Resource Management does a pretty good job of managing TX Power and Channel selection when configured properly. I know that some people out there don't have confidence in RRM, just know that this reflects my opinion regarding the matter.
We covered TX power in part 2 of this series, now let's talk about Dynamic Channel Assignment (DCA). I can't tell you how many times I've been talking with a customer or fellow engineer and they tell me "DCA is broken," "DCA makes poor choices," or "DCA is making poor channel selection choice."
When I ask them to show me why they think this, they generally show me a map that has multiple APs in the hall and several of them are on the same channel and adjacent to each other. Much like the following:
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