We’re not seeing halting, though are working a couple of other issues with
Cisco. We also have both patches applied. Note that neither patch shows up when
you check the version on the GUI, it still claims 1.4.0.45. Ours is a single PI
install with 18k+ concurrent clients, almost 4000 APs and 14
My thoughts (not speaking for my employer) are right along the same lines. The
analytics are nice, but if they’re of interest to departments or colleges, the
same data can likely be gleaned from the university’s own records. On the other
hand, in public venues (sports arenas, outreach events,
For those institutions that are blocking P2P – do you have resident
students/staff/faculty, and how are they taking it? There seem to be are a fair
bit of applications that use P2P protocols, such as Blizzard’s update service,
and I just ran into ASUS distributing driver downloads that way (as
We applied the 1.4 patch, and it seems to have fixed the issue. (The patch is
very terse in display, though, so just be patient since it’ll have to stop and
restart the NCS system. It’ll print something once it’s done. ~20 minutes in
our case, we have a large DB.)
--
Toivo Voll
Network
A number of no-name vendors as well as Crestron, InFocus etc. have devices that
you attach to a TV or projector. They display the device’s name/IP/and a
rolling code. All the ones we’ve tried need a proprietary client – typically
you browse to the name/IP shown to download it – which you then
Putting on my ex-physicist hat for a moment... Without knowing what the
experiment is and how it and its room are shielded, it's hard to tell. That
being said, giving the concerned faculty member the specs (power level, gain,
frequencies) and offering to reduce the power or turn off one of the
It can’t do WPA2 EAP, but it can connect to open networks (assuming the
default/mandatory data rate is 1 / 2 Mbps.)
--
Toivo Voll
Network Engineer
Information Technology Communications
University of South Florida
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
Our experience matches that of a lot of other schools. Initially, for budget
reasons, a few buildings got APs in the hallways, but that's a suboptimal RF
design and will not work properly, and we quickly moved away from that and
instead tackled the hassles of trying to get APs into rooms and
Had a similar question thrown at me a while back. It might be useful to explain
to the person asking some of the various metrics you might be able to measure,
and which ones would look good, which ones would look bad, and so forth. We
were asked for coverage %, among other things, and had to
That has been one of our concerns as well. People increasingly (due to some
internal budget / property accounting rule changes) are getting laptops and
devices they can take off-campus, and our desktop management group has been
starting to look at solutions which “phone home” for patches and
Also, for me, the lack of support for WPA2-Enterprise is a head-scratcher. If
they go through the trouble of supporting the rest of the encryption schemes,
and obviously support it on a bunch of their other products, why randomly leave
it out of some products? I’d prioritize that a bit more,
A couple of observations, in no order of importance:
-Getting people to buy the dual-band wireless adapters, instead of 2.4 GHz
–only ones, for consoles that aren’t natively wireless.
-NAT will kill a lot of games. Unless there’s a magic way to support uPnP in an
enterprise wireless system, you
I assume this also correlates with the size of client subnets and your
supported data rates. We're using /22s, so are a bit concerned.
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mike Goebel
We saw this with Torches and PS3s as well. The bug referred to in the
discussion thread, CSCtn74703, I believe lists the fixed-in versions for both.
Turning off aggressive load balancing may also fix the issue.
Toivo Voll
Network Administrator
Information Technology Communications
University of
Depending on your firmware revision, there may be an issue with BlackBerry
Torches and Aggressive Load Balancing. We believe this is the same issue that
kept PS3s from seeing our wireless LAN. The Bug ID is CSCtn74703 and has been
fixed in latest controller firmware releases, like 7.0(220.0).
Poor Lee. We got one too, very recently :-)
[cid:image002.png@01CC9942.900A30E0]
As to the original thread, we’re using FreeRADIUS with a load balancer in
front. Around 9000-10,000 concurrent users, but relatively few of those are on
WPA.
There are some backends that can be problematic with
Another super-cool thing about Netalyzr is that if you share the whole URL it
gives you after the test, you get the stored results (that’s what the ID is
for). So you can run it and give the results to a help desk, or have your
mother run it and send you the link so you can see what it means.
And here’s ours. We’re mostly dual-band, but not all N, and Band Select is
enabled. Note the number of 802.11b clients.
[cid:image003.png@01CC7DD2.EF4B10A0]
Toivo Voll
Network Administrator
Information Technology Communications
University of South Florida
inline: image003.png
We have 200+ buildings, and some 3000 APs. We have four network engineers and
two operations technicians. Two of the four engineers have a bit more
familiarity with wireless, but nobody that’s mainly a wireless engineer.
Operations handles installing APs for small projects, replacing broken
We’re also running into similar issues with purpose-built PDAs, of the type
used to scan tickets and inventory etc. Also, I seem to recall that Nintendo DS
will not associate if it doesn’t see the 1 Mbps rates. How other universities
are dealing with discontinuing support to existing devices
You can certainly set dBm limits for signal and survey, or data rate limits, or
client density limits, and survey with those. However, there are aspects that
just require one to have knowledge or a feel, of campus.
For example: Where do people typically congregate and use laptops? Which
We don’t always have open access to the hallways either without a chaperone, so
the difference between hallway and room in many residence halls wasn’t that
major. Also, the hallways are straight, so all the APs would end up within
line-of-sight of each other, which isn’t good for RRM
We haven't heard of any complaints or design constraints, though we've
occasionally asked -- I don't know whether there are those specific kind of
spectrometers, though, or the details. I'd be very interested in hearing about
people's experiences in this area as well, as we have some large
We switched over to the Cisco 3500 series from the 1142 series pretty much as
soon as they were available. The added cost vs. the ability to troubleshoot
wireless issues, especially in areas into which we can't just physically go,
such as residence halls, is well worth it. There could
We allow authentication based on machine certificates (EAP-TLS). Works fine in
XP/Vista/7, but setup is a bit of a pain, so we only do this for machines where
it’s absolutely necessary. In general when people come to us for wireless labs,
we advice against relying on wireless for a lab, or
There was a discussion on this list earlier on that, end of October 2010. We
were advised that we needed to turn off load balancing on the APs (we’re
running Cisco controller-based wireless), but none of the users with
misbehaving Torches ever made themselves available again for follow-up
We at the University of South Florida ran into something similar. In response,
we just turned off the lights via software (Cisco) on the residence hall APs
(and came up with a little web tool to turn lights on, off, or blink them a few
times for field personnel to use when they were trying to
You may want to check with your public safety folks before you go Faraday cage
your rooms. They may have something to say about blocking RF in a classroom.
Cell phones not working is a life safety concern, and first responder radio
systems not working even more so.
-Toivo
-Original
We've been getting reports of Blackberry Torches being unable to associate to
our wireless (Cisco) network. Has anyone else seen this? The devices won't even
associate to an open SSID.
Toivo Voll
Network Administrator
Information Technology Communications
University of South Florida
Engineer
ITS Communications Systems and Data Centers
University of Michigan
(734) 615-9438
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Voll, Toivo
Sent: Wednesday, October 20, 2010 10:57 AM
That’s pretty much what we did at USF too, works well.
Toivo Voll
Network Administrator
Information Technology Communications
University of South Florida
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Mike Wiseman
Sent:
We haven’t sent out a survey per se, but we do have a feedback form including a
freeform comment box that follows our captive web portal registration as well
as an email alias. We’ve gotten some pretty decent information from the form,
especially about where faculty and students want to see
University of South Florida is at 15 minutes for unencrypted networks, one hour
for WPA2 authenticated networks.
Toivo Voll
Network Administrator
Information Technology Communications
University of South Florida
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
Ideally 802.1x/WPA(2), with captive web portal for guest access. In reality, a
large number of non-guest users also use web portal and unsecured web, either
because host OSes make WPA configuration unduly burdensome/difficult, or don't
support enterprise WPA (as opposed to PSK-WPA) at all.
On
We benchmarked a Cisco 1142 and an Aruba AP125 (both controller based) a while
back. They had basically identical performance, although they did vary a bit
depending on how many concurrent traffic streams you had, how many clients you
had, whether traffic was uni- or bi-directional etc. One
Your choices may be limited if you plan to run 802.11n. At least Cisco reads
the specs as mandating that you must do WPA2 / AES on 802.11n, other types
(TKIP, WPA) will bump you off 802.11n rates.
Also consider what your user population is. XP may need a hotfix applied to do
WPA2. A lot of
Consider what happens if the professor moves class, cancels class, lets people
out early, or someone decides to skip class and work on a project for something
else in a study area nearby, or is in on-campus dorms sick, trying to access
class material online, or any number of similar scenarios.
LWAPP does bring significant benefits. Whether they're worth the cost is
another matter.
1) Radio Resource Management. The system will figure out how to properly
interleave channels and set power levels for minimum interference. It's not
100% perfect, but I wager it's better than almost any
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