Ekahau Site Survey 5.5 11
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Mistakes can be made with the use of survey tools that are able to make a site survey report look good. These mistakes can make an entire floor or building appear to have sufficient coverage when, in reality, client devices in certain areas can have very weak coverage.
Data gathered from a map that is not properly calibrated results in a completely inaccurate survey report. It is recommended to verify the map calibration in survey reports where the heat maps do not look correct.
In most cases, there is a single data point or AP radio provides much larger coverage in the survey map when compared to actual coverage. It is a good practice to view AP heat maps individually and verify the actual size of the coverage.
You cannot recalibrate the map after the survey is performed to repair survey data that was taken when the map calibration was not properly scaled. You must correct the map calibration and perform a new survey.
The primary objective of a post-validation site survey is to provide detailed information that addresses the current RF coverage and determines whether there is sufficient coverage to support the network design requirements.
Post-validation surveys must also include information that addresses interference sources, equipment placement, and rogue devices. The site survey documentation serves as a guide for the verification of the wireless infrastructure.
It is possible to have a survey report that shows good coverage in all areas; however, if you have APs that operate at the highest transmit power, you possibly continue experience uplink issues where the client devices do not support the same transmit power.
TamoGraph is a powerful and user-friendly wireless site survey software tool for collecting, visualizing, and analyzing 802.11 a/b/g/n/ac/ax Wi-Fi data. Wireless network deployment and maintenance requires the use of a professional RF site survey tool that facilitates otherwise time-consuming and very complex tasks, such as ongoing analysis and reporting of signal strength, noise and interference, channel allocation, data rates, etc.
In a word, wireless site surveys are necessary because radio wave propagation is difficult to predict, especially in non-open space environments. It is virtually impossible to consider all the variables that might affect the health and performance of your WLAN. Changing conditions, even something as seemingly minor as a notebook equipped with a legacy 802.11g adapter that your new employee connected to the office wireless network, might seriously affect the WLAN performance. In addition, considering the wide proliferation of wireless infrastructure, factors such as interference from nearby WLANs play a very important role. This is why regular site surveys that are conducted with a professional tool are important.
I have no idea about wifi signal propagation in your building. You need to do the work (ie a wifi survey using things like Ekahau and InSSIDer for signal strength and iPerf to check wifi to wired speed) to establish where the signal is strong, weak or indifferent (look at RSSI values in the chart in InSSIDer. Do not rely on the pretty pictures!) and make adjustments as appropriate. It's your choice as to what is appropriate for your network. It may be that adjusting data rates doesn't quite make it so adjusting power outputs is another tool on your belt IF you need it. My point was to make you aware of ALL the options as you didn't seem to know about any of them.
All that said the FIRST, MOST CRITICAL job you MUST do is some sort of site survey so that you know where you are now. Then you can make adjustments and compare the results. Anything else is a guessing game. Don't expect to get it right first time. My "worst" network was a two AP job where the AP's were separated by just 10 feet horizontally and about 5 feet vertically (not my choice) with a floor/ceiling between them. Took me six hours of faffing around to get the roaming working well. If it was my choice, I would have moved the AP locations but that wasn't an option. My most recent best network was 21 AP's in a challenging environment and apart from 1 AP I got it right first time. In both cases job number 1 was disabling data rates below 11Mb/s. I use this as a base line as it will keep wireless B devices (if any still exist) from joining the AP and dragging it down. From there the real work can begin, starting with a site survey using Ekahau for heatmaps, InSSIDer for signal (RSSI) values and iPerf to see how fast the wifi is. And without that last step, how are you going to deal with complaints that "the wifi is slow". "Slow" is not a measurement that can be tested. Having a list of bandwidth values from testing means you can verify the wifi speed when you get a complaint and you will be able to demonstrate whether is slow or not. This will prevent you having to fix something that may not be broken or it may clearly show a change in network behavior that should be addressed.
Point being, we have functionality available to us in newer WLC code to not ever have to touch TPC. It requires some work and understanding of the RF environment, and that's where the survey Mark rightfully recommended would come in. I've actually had to manually adjust power settings in a warehouse Meraki environment where old .11b clients were experiencing the 'sticky client' problem, and Meraki APs just wouldn't function properly. They did just fine with the 7925 wireless phones. After each power adjustment, I had to resurvey the area.
I'm in the middle of my first deployment with 8.x code and I'm not yet ready to do the pre-install survey the site. Looking forward to this. And your .11r analysis is spot on. I wish there was universal client support for it...
What do you use for your surveys, Ekahau? I've been using that for a couple years now, and it works great. I've also been trying to get my clients on somewhat of a standardized survey process, where we'll do a predictive survey first, then go in with our equipment, AP-on-a-stick and all, for the physical, then once the APs are installed, we'll go back in for the validation walk through. We've been getting so close with the predictives, in some cases we'll forgo the physical survey in higher favor of the post install validation.
If this was a greenfield design at 30 feet, I'd lean towards a patch or maybe a downtilt Omni depending on the building layout. You really should do an AP on a stick survey though to validate the antenna choice.
HeatMapper is the free version of a more powerful Wi-Fi surveying tool called Ekahau Site Survey. HeatMapper lets you do surveys for only 15 minutes at a time; Site Survey gives you unlimited time, along with additional features. Pricing varies according to the size and complexity of your network.
If you're looking for the simplest and most basic test of your Wi-Fi speed, then Ookla Speedtest is the way to go. You don't need to download any software (which means this particular app works just fine for Macs as well). Just head to the site, click "Begin Test" and the site tests your upload and download speeds. It's a great tool for getting quick-and-dirty information about your network's throughput.
A mixture of IAP304 (with directional antenna - AP-ANT-38) and IAP305 (omni). There is an IAP304 mounted on every aisle in the Warehouse - these are staggered so that they are at opposite ends every aisle (x22). The IAP305s are mounted in the middle of every other aisle (x11).
A mixture of IAP304 (with directional antenna - AP-ANT-38) and IAP305 (omni). There is an IAP304 mounted on every aisle in the Warehouse - these are staggered so that they are at opposite ends every aisle (x9). There are x2 IAP305s in the middle of the warehouse although we currently have these set to spectrum monitor mode.
If you have site survey software, you should do a limited survey of the areas determined to have the worst issues, to see what access points are really providing coverage in those areas and if they are part of the problem.
We are relying on the AP connecting to the internal EWC automatically when surveying. This can be accomplished by accessing the console of the AP and configuring an IP address (the former configured IP address configured in step 5 is removed during the upgrade).
Navigate to WiFi & Switch Controller > FortiAP Profiles > Create New > Radio 2 > Channel Width. Use the widest you can. You can know by getting a real site survey. You can also use WiFi scanner tools like insider by MetaGeek, WiFi Explorer, Ekahau Site Survey, and many more to at least get some data on what spectrum is being used.
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