<div dir="ltr">On Sat, Aug 27, 2016 at 12:55 AM, Anish Mangal <span dir="ltr"><<a href="mailto:anishmg@umich.edu" target="_blank">anishmg@umich.edu</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div>FWIW, on an older 2nd gen NUC I also see max 10-12 connections on the WiFi. I dont know if I have tried the latest kernel on that, so your finding is atleast consistent with older gen NUCs.<br></div></div></div></blockquote><div><br></div><div>FYI Kernel 4.4.14 (Fedora 22's latest upon yum update) is no better:<br>12 simultaneous WiFi connections is still the maximum we're able to sustain from random OS's to NUC6i3SYH's internal WiFi (*)<br><br></div><div>Sadly the latest WiFi driver from Intel also does not help: (for 6i3's internal WiFi "Intel® Dual Band Wireless-AC 8260")<br><a href="http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/000005511.html">http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/000005511.html</a><br><a href="https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-8000-ucode-25.30.13.0.tgz">https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-8000-ucode-25.30.13.0.tgz</a><br><br></div><div>(*) Curious Anomaly: Android WiFi connections made within the "first 12 WiFi connections" can hold on to their DHCP/WiFi connections, remaining active and usable as 13th and 14th connections etc, as other laptops connect, <i>until they disconnect from WiFi</i>. But when 12 laptops (or iOS) have connected to WiFi, and one of these Android WiFi connections happens to drop, it will not be able to reconnect to WiFi -- until one of the 12 laptops (or iOS) disconnects. Baffling that DHCP issues more than 12 IP simultaneous IP addresses in these exceptional cases, when Android has snuck in connecting early on.<br><br>Other OS's (Windows, Linux, Mac, iOS) however do not demonstrate Android's unusual/sneaky/resilient behavior. In any case, this Android curiosity (however tantalizing, no idea how Android's apparently able to circumvent the "max 12" limit) does not solve the larger/general problem of supporting all OS's!<br><br></div><div>Any other angles of attack??<br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div>Beyond that number of users, one should anyway consider a router. <br></div><br></div>Off the shelf routers like 701nd support around 15 users, but with openwrt they have been reported to support upwards of 30. <br></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Sat, Aug 27, 2016 at 4:56 AM, James Cameron <span dir="ltr"><<a href="mailto:quozl@laptop.org" target="_blank">quozl@laptop.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Doesn't sound right.<br>
<br>
What happened to stop the test?<br>
<br>
Isn't the CentOS 7.2 kernel used in your test way older than the RPi3<br>
kernel?<br>
<br>
It would appear that CentOS 7.2 released with kernel 3.10 dated 30<br>
June 2013, with minimal changes patched into it since. Perhaps it<br>
needs another fix.<br>
<br>
RPi3 kernel with Rasbian is 4.4 dated 1 November 2015.<br>
<br>
Bisect the problem broadly. Try the latest kernel.<br>
<br>
There have been many wireless driver and wireless networking changes<br>
between the two kernels. There's a possibility it may be one of them<br>
you have hit.<br>
<span><font color="#888888"><br>
--<br>
James Cameron<br>
<a href="http://quozl.netrek.org/" rel="noreferrer" target="_blank">http://quozl.netrek.org/</a><br>
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</font></span></blockquote></div><br><br clear="all"><br></div></div><span class=""><font color="#888888">-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><div>Anish<br></div><div><br><br></div></div></div>
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