What is considered to be "too many clients per AP"? We have 30 APs and 450 K-12 students (100 of which are dorm students). We also have a number of "carts" containing 15+ laptops the move around the school, "carts" with 15+ Ipads moving around the school and computers labs (stationary!) with 15 + computers.
350+ devices at any given time. I have seen as many as 50+ on a single AP quite often. Bob Williamson Network Administrator Annie Wright Schools | 827 N Tacoma Ave, Tacoma, WA 98403 | www.aw.org D: 253.272.2216 | F: 253.572.3616 | [email protected] Mission: Annie Wright's strong community cultivates individual learners to become well-educated, creative, and responsible citizens for a global society. Find Annie Wright Schools on Facebook Follow our Head of Schools on Twitter @AWShead -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Ian McDonald Sent: Sunday, February 24, 2013 10:56 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Residence Hall Wireless survey Ok, 3 per person is about what we see too, but then we've an ap:student ratio of approx 1:9, and some places are 1:6 (it worked out that way due to the construction) The AP's are dual-band too. We disable the slowest rates, encouraging devices to actually be connected to the nearest ap, rather than 'the one they saw first'. Most of the ap's are at half power too, as we saw it as a density over coverage situation. What ap:student ratio are others running? Thanks -- ian -----Original Message----- From: Frank Sweetser Sent: 24/02/2013, 18:31 To: [email protected] Subject: Re: [WIRELESS-LAN] Residence Hall Wireless survey High density doesn't surprise me very much. We try to track general student wireless device, and this last year and this we had a decent amount (I forget the percentage, but it was non-trivial) that had three wireless devices per person - a laptop, table, and smart phone each. Throw in a wireless game console or media device, and you can easily have far more devices than people. The fact that many of them are always-on, low power, and low speed is just an added bonus. As for rogue devices, banning all wireless printers would be a good start... Frank Sweetser fs at wpi.edu | For every problem, there is a solution that Manager of Network Operations | is simple, elegant, and wrong. Worcester Polytechnic Institute | - HL Mencken On 2/24/2013 1:27 PM, Ian McDonald wrote: > I'm quite surprised that people are experiencing too many devices per > ap, as that implies either incredibly dense student packing, or a > relatively small number of access points in an area. > > We've seen some remarkably attenuating walls and floors, but given > contruction details (or best guess given age), that can be overcome. > We don't expect through-floor propagation in any modern structure, due > to the wrinkly-tin floors, but we also discovered that one of our > buildings was once an X-Ray clinic ;) > > I'm personally not keen on putting equipment into student rooms, as > getting back in when it goes wrong tends to be a challenge, as it's > ever more onerous getting access. > > So, what can we do about rogue devices? Suggestions on the back of an > estwing fire-ax please. > > -- ian -----Original Message----- From: Julian Y Koh Sent: > 24/02/2013, > 17:32 To: [email protected] Subject: Re: > [WIRELESS-LAN] Residence Hall Wireless survey > > On Feb 22, 2013, at 14:00 , Julian Y Koh <[email protected]> wrote: >> >> OK, there's no need for everyone to respond - as I wrote before, >> we're going to be sending the total/aggregate results to the entire >> list. :) > > And here we are! Total of 56 responses. Here are the highlights. > Please post any additional questions here and I'll see if any of the > data will help. Thanks again to everyone!! > > > 1.) Primary equipment vendor: Cisco 55.4% Aruba 26.8% Meru 7.1% > Juniper 5.4% > > 2.) Initial AP placements: Hallways/Common Areas 94.6% Individual > Resident Rooms 5.4% > > 3.) Experiencing issues? Yes 85.7% No 14.3% > > 4.) Kinds of problems? Too many client devices per AP 64.6% Rogue wireless > devices 58.3% High signal attenuation 45.8% Low signal > attenuation 14.6% > > 5.) Options considered to address issues? Adding APs 84.6% > Relocation APs 73.1% Changing Vendors 17.3% > > 6.) New AP placements: Individual Resident Rooms 68.0% > Hallways/Common Areas 46.0% > > 7.) Mount types: Ceilings 89.1% Walls > 34.5% Embedded Wall Boxes 10.9% > > 8.) Success at remediation? Very Successful 45.2% Moderately > Successful 31.0% Not Successful 2.4% > > -- Julian Y. Koh Manager, Network Transport, Telecommunications and > Network Services Northwestern University Information Technology (NUIT) > 2001 Sheridan Road #G-166 Evanston, IL 60208 847-467-5780 NUIT Web Site: > <http://www.it.northwestern.edu/> PGP Public > Key:<http://bt.ittns.northwestern.edu/julian/pgppubkey.html> > > ********** Participation and subscription information for this > EDUCAUSE Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > ********** Participation and subscription information for this > EDUCAUSE Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
