iOS 8 issues?
We just got this wonderful tidbit from a local engineer with one of the major wi-fi vendors (would prefer to maintain anonymity); anybody else seeing this yet? -- Jim Gogan / ITS Communication Technologies UNC-Chapel Hill = FYI, ... A message from one of my other customers about ios 8. We are seeing some wireless issues related to iOS 8 on iPhones. It appears that Apple has set their devices to 'aggressively' roam between WiFi and carrier data networks. The result is phones have a tendency to flap back and forth between the university's wireless network and the carrier's network (in my case Verizon's LTE network). I have not seen this in previous Apple software releases. Turning off cellular data seems to remedy the issue, but that forces the user to continually turn data services on and off as they come and go from campus. We are also seeing more of a delay in the EAP authentication process on our WPA2-Enterprise network. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
anybody using Aruba's Tarpit Shielding feature?
Was wondering if anyone with a large Aruba deployment has enabled their Tarpit Shielding feature for dealing with rogue issues (full description below for anyone not familiar with it)?If so, is that working out for you?Has it caused problems for folks unrelated to rogue units? Inquiring minds etc. etc. Thanks in advance! -- Jim Gogan ITS Communication Technologies UNC-Chapel Hill description: Tarpit Shielding The Tarpit Shielding feature is a type of wireless containment. Detected devices that are classified as rogues are contained by forcing client association to a fake channel or BSSID. This method of tarpitting is more efficient than rogue containment via repeated de-authorization requests. Tarpit Sheilding works by spoofing frames from an AP to confuse a client about its association. The confused client assumes it is associated to the AP on a different (fake) channel than the channel that the AP is actually operating on, and will attempt to communicate with the AP in the fake channel. Tarpit Shielding works in conjunction with the deauth wireless containment mechanism. The deauth mechanism triggers the client to generate probe request and subsequent association request frames. The AP then responds with probe response and association response frames. Once the monitoring AP sees these frames, it will spoof the probe-response and association response frames, and manipulates the content of the frames to confuse the client. A station is determined to be in the Tarpit when we see it sending data frames in the fake channel. With some clients, the station remains in tarpit state until the user manually disables and re-enables the wireless interface. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] Replacing ageing APs
Same here --- for a long time, our refresh budget consisted of whatever the Provost had available near the end of the fiscal year (yeah, THAT'S sustainable .); two years ago, we were finally able to get through an entirely new model for network funding that was based on a payroll tax (a fixed percentage of faculty-staff payroll budget per department) on all departments and a student fee re-allocation at the same rate as the payroll tax. So far, so good. What helped is that we didn't have to originate that payroll tax concept; our Campus Services unit had already gotten that concept approved to pay for the University's share of the town-and-gown bus system. We just took advantage of the precedent. I'm unable to provide the full advisory committee report that researched and recommended the new funding model to the Chancellor, but this link: http://its.unc.edu/commtechnology/communication-technologies/new-funding-model-faq/ should give most of the details. Now the challenge is managing expectations in terms of WHO'S getting upgraded each year. -- Jim Gogan / ITS Comm Tech UNC-Chapel Hill -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Daniel Eklund Sent: Thursday, August 07, 2014 8:19 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Replacing ageing APs Oli, The University of Michigan has been in a similar position until recently. We are moving toward a funding model whereby units will provide central IT with funding sufficient to cover their portion of the wired and wireless infrastructure on campus. The initial refresh of WiFi is being provided by one-time funding. We already do this for the core network on campus, as well as for our Internet connections, so we are pretty confident that this will move forward since everyone wants to have a reliable and up to date network. -- Daniel Eklund Network Planning Manager ITS Communications Systems and Data Centers University of Michigan 734.763.6389 On Thu, Aug 7, 2014 at 4:00 AM, Oliver Elliott oliver.elli...@bristol.ac.uk wrote: Hi all I've been looking into EOLs and end of software support for some of our older APs and was wondering what other institutions do to keep their estate up to date. Up to now we've had very sparse funding for wireless as it was always viewed as an add on service. A recent outage (caused by buggy 7.6.120 code) has shown just how important Wifi has become. Up to now APs have been largely installed on an ad-hoc basis with funding from departments or projects but this doesn't tend to account for EOL replacement. We're looking to apply for a formal replacement project based on either rolling yearly replacement budget or a big bang approach every few years. So, how do you guys handle this problem? Oli -- Oliver Elliott Network Specialist IT Services University of Bristol e: oliver.elli...@bristol.ac.uk t: 0117 92 (87861) ** 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/.
time for the annual wifi will kill us response
Well, it's that time of year again, wherein we get the following contact from one faculty member or staff member (out of tens of thousands of students, faculty and staff): I am an adjunct faculty member and I would like to have a meeting with someone that is charge of the WiFi system on the UNC-CH campus. I believe that there is a significant health risk to all students and faculty around this type of radiation. I would like the opportunity to bring solid research and professionals before you to present the materials. This cannot be ignored. The liability is too great to all of the students and faculty. And just like folks that come up with scientific studies that there's no climate change and the Earth is 7,000 years old, of course he has research links to back his claims. Before I go digging out what studies and replies we've used in past years when this has come up, I was wondering (a) how many of you also have to deal with this and (b) has there been anything more recent in terms of research we can point to than what I dug up years ago? Thanks in advance -- Jim Gogan / ITS Comm Tech Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Google Glass experiences
Quick question: what have folks found so far re: connecting Google Glass to campus wireless? what works/what (more likely) doesn't? -- Jim Gogan / UNC-Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] interesting design recommendation from ......
Following up on the note below from my colleague, the full explanation from the Aruba exec was as follows: (I) wanted to let you know that Aruba is not discontinuing support for WEP/TKIP.The Wi-Fi Alliance was planning to enforce discontinuation of WEP/TKIP - which would have required us to follow suit - but they backed down under pressure from end users. Since there's no longer a WFA requirement to remove WEP/TKIP, we will continue to support it. So there it is.If anyone else had also heard from their Aruba support that WEP/TKIP was going away in 2013, that's not happening now. Two thoughts on that: (1)nice that user pressure can have an impact (2)I'm kinda ambivalent about the fact that WEP/TKIP WILL continue to be supported.It was actually better for us being able to tell departments sorry, you FINALLY have to upgrade your old equipment 'cause the manufacturer is pulling the plug.There's only so much authority we have and being able to say we can't works better than saying we won't Maybe if I don't tell folks .. h. -- Jim Gogan / UNC-CH From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lane, Todd Sent: Thursday, November 29, 2012 5:33 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. I was contacted by Aruba after they saw my post below and advised Aruba is not discontinuing support for WEP/TKIP. Todd Lane University of North Carolina at Chapel Hill From: Lane, Todd Lane todd_l...@unc.edumailto:todd_l...@unc.edu Reply-To: EDUCAUSE Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: Thursday, November 29, 2012 3:36 PM To: EDUCAUSE Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Mike, This is what we're being told by Aruba. WEP / TKIP will be unsupported starting in a future release. I believe it will be 6.2. ArubaOS 6.2 has a target date for June 2013 Todd Lane University of North Carolina at Chapel Hill From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mike King Sent: Wednesday, November 28, 2012 9:54 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Unfortunately James, I don't see support for WEP / TKIP going away anytime soon. WEP was broken in August of 2001. That was 11 years ago. WPA2 has been available since June 2004. That was 7 years ago. WPA with TKIP was Only published as a temporary measure, until WPA2 was ratified, and was supposed to cease being used when WPA2 was published. Yea, that didn't happen. No vendor want's to lose a sale because they weren't backward compatible. Only you (the operator of the network) has the power to draw the line in the sand, and say we will only support WPA2. (Let me know how that works out, since I would love to try that) Mike On Wed, Nov 28, 2012 at 9:42 AM, Gogan, James P go...@email.unc.edumailto:go...@email.unc.edu wrote: We continue to see 75% or more of our user population hanging on with 2.4 devices . frustrating. have to continue to engineer for the bulk of users being 2.4 for the foreseeable future. And while I'm venting - we're STILL having a hell of a time getting all of the departments that utilize utility monitoring devices, ticket scanners, classroom touch panels, etc. that ONLY support WEP and/or TKIP to upgrade their devices. In some cases, the response has been we'll upgrade if you pay for it; we keep telling them they're going to be screwed when the vendors drop support for those protocols. Oh, well - such is life with responsibility without authority. -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Wednesday, November 28, 2012 9:28 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Seems like there should be a bit more to the discussion... power levels, designing for 5 GHz and disable a 2.4 GHz radio or three along the way if too many, etc- expected % of clients expected in 5 vs 2.4 versus just a number of clients, etc. -Lee From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Gogan, James P Sent: Wednesday, November 28, 2012 9:23 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] interesting design recommendation from .. We currently have a mix of Cisco (legacy) and Aruba (last two years) APs
question about EAP-TTLS/PAP config
Can someone from a large institution using EAP-TTLS with PAP (preferably going to Kerberos) follow up with me off-list? If you're using SecureW2 as your supplicant, even better. I've got a question that I'd rather not pose to the full list. Thanks in advance. -- Jim Gogan / Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
interesting design recommendation from ......
We currently have a mix of Cisco (legacy) and Aruba (last two years) APs (although we're good at keeping any given building single brand, as much as possible). We've generally gone with an engineering rule of thumb of 20-30 clients per access point. We've noticed issues with channel flapping and inadequate load balancing on our Aruba APs in large classrooms where we have, based on our client per AP engineering, large numbers of APs.After an on-site visit from an Aruba engineer, his comment was that we have TOO MANY APs in our classrooms and high density areas.His recommendation (using the Aruba AP135s) was that we design based on 80 clients per AP (minimum 50, average 80, max 100), and to design based on 50 clients per AP for the older AP125s. I'd be curious to know what others think about that recommendation -- seems pretty significantly different from everything we've been told and designed for in the past. (BTW, the engineer also noted that he's not a sales guy and the sales guys would suggest differently -- figures). Thoughts? -- Jim Gogan ITS-Networking Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: interesting design recommendation from ......
We continue to see 75% or more of our user population hanging on with 2.4 devices . frustrating. have to continue to engineer for the bulk of users being 2.4 for the foreseeable future. And while I'm venting - we're STILL having a hell of a time getting all of the departments that utilize utility monitoring devices, ticket scanners, classroom touch panels, etc. that ONLY support WEP and/or TKIP to upgrade their devices. In some cases, the response has been we'll upgrade if you pay for it; we keep telling them they're going to be screwed when the vendors drop support for those protocols. Oh, well - such is life with responsibility without authority. -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Wednesday, November 28, 2012 9:28 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Seems like there should be a bit more to the discussion... power levels, designing for 5 GHz and disable a 2.4 GHz radio or three along the way if too many, etc- expected % of clients expected in 5 vs 2.4 versus just a number of clients, etc. -Lee From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Gogan, James P Sent: Wednesday, November 28, 2012 9:23 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] interesting design recommendation from .. We currently have a mix of Cisco (legacy) and Aruba (last two years) APs (although we're good at keeping any given building single brand, as much as possible). We've generally gone with an engineering rule of thumb of 20-30 clients per access point. We've noticed issues with channel flapping and inadequate load balancing on our Aruba APs in large classrooms where we have, based on our client per AP engineering, large numbers of APs.After an on-site visit from an Aruba engineer, his comment was that we have TOO MANY APs in our classrooms and high density areas.His recommendation (using the Aruba AP135s) was that we design based on 80 clients per AP (minimum 50, average 80, max 100), and to design based on 50 clients per AP for the older AP125s. I'd be curious to know what others think about that recommendation -- seems pretty significantly different from everything we've been told and designed for in the past. (BTW, the engineer also noted that he's not a sales guy and the sales guys would suggest differently -- figures). Thoughts? -- Jim Gogan ITS-Networking Univ of North Carolina at Chapel Hill ** 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/.
RE: interesting design recommendation from ......
I think the operative words there are recent client --- we have many departments that purchase network-attached devices (scanners, utility monitors, touchpanels, etc.) that are expected to last for 7-10 years (or longer). Within the state budgeting system, there is no ability to amortize equipment or build up a life-cycle/refresh reserve (all unused dollars at the end of each fiscal year are reverted to the state treasury) - as such, it's all based on ability to get one time new-equipment funds -- hence the last for 7-10 years (or longer) environment. Makes life interesting .. -- jg / UNC From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Osborne, Bruce W Sent: Wednesday, November 28, 2012 11:14 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Mike, Here at Liberty University, we only support WPA2-Enterprise and an open SSID that only permits non-802.1X devices registered by the user. We place some restrictions on the open network to encourage the use of the WPA2-Enterprise network. The sole exception is a hidden WEP network for some old Cisco wireless phones. Once they are retired, that network will disappear. When we supported WPA2-Personal, we only allowed AES encryption with no issues at all. Why allow TKIP, except for migration to AES? I have not seen any recent client that does not support WPA2, except for these old Cisco phones on a non-Cisco wireless network. Bruce Osborne Network Engineer IT Network Services (434) 592-4229 LIBERTY UNIVERSITY Training Champions for Christ since 1971 From: Mike King [mailto:m...@mpking.com] Sent: Wednesday, November 28, 2012 9:54 AM Subject: Re: interesting design recommendation from .. Unfortunately James, I don't see support for WEP / TKIP going away anytime soon. WEP was broken in August of 2001. That was 11 years ago. WPA2 has been available since June 2004. That was 7 years ago. WPA with TKIP was Only published as a temporary measure, until WPA2 was ratified, and was supposed to cease being used when WPA2 was published. Yea, that didn't happen. No vendor want's to lose a sale because they weren't backward compatible. Only you (the operator of the network) has the power to draw the line in the sand, and say we will only support WPA2. (Let me know how that works out, since I would love to try that) Mike On Wed, Nov 28, 2012 at 9:42 AM, Gogan, James P go...@email.unc.edumailto:go...@email.unc.edu wrote: We continue to see 75% or more of our user population hanging on with 2.4 devices . frustrating. have to continue to engineer for the bulk of users being 2.4 for the foreseeable future. And while I'm venting - we're STILL having a hell of a time getting all of the departments that utilize utility monitoring devices, ticket scanners, classroom touch panels, etc. that ONLY support WEP and/or TKIP to upgrade their devices. In some cases, the response has been we'll upgrade if you pay for it; we keep telling them they're going to be screwed when the vendors drop support for those protocols. Oh, well - such is life with responsibility without authority. -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Wednesday, November 28, 2012 9:28 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] interesting design recommendation from .. Seems like there should be a bit more to the discussion... power levels, designing for 5 GHz and disable a 2.4 GHz radio or three along the way if too many, etc- expected % of clients expected in 5 vs 2.4 versus just a number of clients, etc. -Lee From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Gogan, James P Sent: Wednesday, November 28, 2012 9:23 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] interesting design recommendation from .. We currently have a mix of Cisco (legacy) and Aruba (last two years) APs (although we're good at keeping any given building single brand, as much as possible). We've generally gone with an engineering rule of thumb of 20-30 clients per access point. We've noticed issues with channel flapping and inadequate load balancing on our Aruba APs in large classrooms where we have, based on our client per AP engineering, large numbers of APs.After an on-site visit from an Aruba engineer, his comment was that we have TOO MANY APs in our classrooms and high density areas.His recommendation (using the Aruba AP135s) was that we design based on 80 clients per AP (minimum 50, average 80, max 100), and to design based on 50 clients per AP for the older
RE: Xpressconnect and Windows 8
We've not gotten XpressConnect to work happily with Windows 8 yet, so I'm interested in this as well.Have sent an email to Cloudpath Support on this, but I'm guessing all Windows 8 questions are awaiting the official Friday release. -- Jim Gogan / UNC-Chapel Hill From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Peter P Morrissey Sent: Wednesday, October 24, 2012 8:47 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Xpressconnect and Windows 8 I'm curious if anyone has gotten Windows 8 devices configured for 1x, using Xpressconnect. I realize there are lots of issues with Windows 8 drivers that make this complicated, so I'm just wondering how it is working when the drivers are capable. Thanks, Pete Morrissey ** 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/.
FreeRADIUS performance question
A question for folks with relatively large 802.1x (greater than 15,000 unique clients) wi-fi deployment (EAP-TTLS) with a FreeRADIUS infrastructure using Kerberos as the backend authentication . - how many FreeRADIUS servers do you deploy?, and - have you changed any of the default eap.con/radius.conf performance parameters/values? The good news is that we've started the year with a lot more folks finally using the 802.1x network than the last academic year. The bad news is that we're getting long delays in connecting/authenticating -- not just a wireless issue as we're also getting lots of RADIUS server FAILED traps from our VPN concentrators throughout the day since the semester started (using the same RADIUS servers as the 1x wireless deployment) We've also been seeing in the last three days HUGE numbers of: Aug 22 19:25:00 calvin radiusd[21691]: Discarding duplicate request from client Wireless8021XResNET port 32769 - ID: 76 due to unfinished request 253745 Aug 22 19:25:00 calvin radiusd[21691]: Discarding duplicate request from client Wireless8021XResNET port 32769 - ID: 140 due to unfinished request 253705 Aug 22 19:25:00 calvin radiusd[21691]: Discarding duplicate request from client Wireless8021XResNET port 32769 - ID: 85 due to unfinished request 253758 and Aug 19 03:30:14 calvin radiusd[3507]: Login incorrect: [anonymous] (from client Wireless8021XResNET port 29 cli 68-a8-6d-ae-fc-5d) Aug 19 03:31:15 calvin radiusd[3507]: Login incorrect: [anonymous] (from client Wireless8021XResNET port 29 cli 28-6a-ba-6a-9d-6e) Aug 19 03:31:35 calvin radiusd[3507]: Login incorrect: [anonymous] (from client Wireless8021XResNET port 29 cli c8-bc-c8-2e-52-13) Aug 19 03:32:13 calvin radiusd[3507]: Login incorrect: [anonymous] (from client Wireless8021XResNET port 29 cli 10-40-f3-29-60-2c) which, from what we can discern from the wonderful world of google, may be related to a slow database, although our Kerberos folks don't see any issues on their end. Any thoughts? Responses to the two questions above would be appreciated ... thanks!! -- Jim Gogan / Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
selectively disabling wireless in classrooms
Well, it's that time of year again the time when we get calls from a handful of faculty who want the ability to disable the wireless access point that covers their classroom during specific class periods (they also want cellular coverage disabled during those times -- yeah, right ..).When I point out that the AP that covers their classroom may also provide coverage for the one next door, or that with a controller-based architecture, shutting off one access point would likely just increase the signal coverage area of adjacent APs, the response I usually get back is well, I KNOW that other universities are doing it, so FIX IT. So, let me ask my biennial question: what ARE other universities doing in this regard?I was specifically given U of Michigan as an example.Anyone know what they're doing? Any successful implementation details from anyone dealing with this issue are welcome.And yes, I am biting my tongue to not say teach more engagingly. Thanks in advance! -- Jim Gogan / Univ of North Carolina ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] ATT WiFi
This actually wouldn't be a bad thing for places like the stadium and dean dome if we can manage channel interference -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Dewitt Latimer Sent: Thursday, July 21, 2011 12:29 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] ATT WiFi As a person who travels to many campuses, I can tell you that having my iPhone auto-associate with a campus WiFi is a whole lot nicer than having to bug my hosts to sponsor me for a guest wireless account. So I think the real way to look at this is (1) how many guests do you have to your campus, (2) do you care about them, (3) is your wireless guest registration system self sponsored and simple, or a real PIA? You don't necessarily have to overlay the ATT ssid over your whole campus either. You can hit (say) the performing arts, campus hotel and conference, etc. But that's more of a political outcome than technical. If you go through the hassle of a couple of buildings, you might as well do them all. Also, ATT almost always brings their own commodity bandwidth to the bargaining table. So depending on how many guests you have anyway, you can off load some of their data to their pipe. -d On Thu, Jul 21, 2011 at 12:16 PM, Lee H Badman lhbad...@syr.edumailto:lhbad...@syr.edu wrote: Ryan- Do you feel there has been any real value to OSU, or any downside? Thanks- Lee H. Badman Wireless/Network Engineer Information Technology and Services Adjunct Instructor, iSchool Syracuse University 315 443-3003tel:315%20443-3003 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Holland, Ryan C. Sent: Wednesday, July 20, 2011 1:34 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] ATT WiFi We have it here at OSU, and it works adequately. Nothing special. Just a L2 handoff from our equipment to theirs. == Ryan Holland Network Engineer, Wireless Office of the Chief Information Officer The Ohio State University 614-292-9906tel:614-292-9906 holland@osu.edumailto:holland@osu.edu Submit a Kudos to an OCIO employee!http://www.surveygizmo.com/s/514095/giveociokudos On Jul 20, 2011, at 1:17 PM, Steve Hess wrote: Anyone have experience with the ATT WiFi product? Upper management is looking into it here. My understanding is they will use our existing Aruba infrastructure to propagate the signal. Curious for input from others on direct experience and technical considerations (in general and as relates to Aruba specifically). Thanks, Steve -- - Steve Hess Network Administrator Wheaton College Phone: 508-286-3404tel:508-286-3404 Fax: 508-286-8270tel:508-286-8270 - Spamhttps://antispam.osu.edu/b.php?i=1228228303m=da5d14dd5179c=s Not spamhttps://antispam.osu.edu/b.php?i=1228228303m=da5d14dd5179c=n Forget previous votehttps://antispam.osu.edu/b.php?i=1228228303m=da5d14dd5179c=f ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. No virus found in this message. Checked by AVG - www.avg.comhttp://www.avg.com Version: 10.0.1390 / Virus Database: 1518/3776 - Release Date: 07/20/11 ** 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/.
RE: [WIRELESS-LAN] Interference in dorms.
That kinda begs the question then what DO you do about Wii's (for example)? Do you have 1-2 Mbps disabled? -- Jim Gogan UNC-Chapel Hill From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tim Fairlie Sent: Thursday, July 21, 2011 1:31 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. Yep, that was our experience with Wii's. Through experimentation we saw that once the Wii joined, if you disabled 2mpbs, they'd stay on...but they couldn't join if 2mbps wasn't on initially. Really weird Timothy J. Fairlie - Director Network/User/Telecommunication Services (N.U.T.S) Rider Universityfair...@rider.edumailto:fair...@rider.edu - Rick Coloccia coloc...@geneseo.edumailto:coloc...@geneseo.edu wrote: Be careful disabling 2 mbps. We were told at the Cisco conference in a wireless class just last week that the Wiis require 2mbps to successfully find and join the wireless network. I have not personally verified this, but the source is reliable... -Rick On 7/21/2011 12:58 PM, Johnson, Neil M wrote: We are struggling with the same issues. We are finding that X-boxes and PS3s generate lots of interference (they use a proprietary 2.4 protocol between the joysticks and console). This summer we've added over 100 AP to the dorms, moved several, changed our AP's antenna configuration, disabled 1 and 2 Mbps data rates, and are implementing channel layering (Meru) to try and address the issue. We are also planning on being more aggressive at getting rid of student installed wireless AP's. We are considering adding a 5GHz only SSID in the dorms to encourage users to use 5 GHz ( we do have band steering enabled, but a dedicated SSID would insure that devices only use 5GHz and not fall back to 2.4). We'll see what happens. -Neil -- Neil Johnson Network Engineer The University of Iowa Phone: 319 384-0938 Fax: 319 335-2951 Mobile: 319 540-2081 E-Mail: neil-john...@uiowa.edumailto:neil-john...@uiowa.edu From: Lay, Daniel dl...@samford.edumailto:dl...@samford.edu Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: Thu, 21 Jul 2011 11:16:29 -0500 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Interference in dorms. Last year we had several students that would complain about poor wireless coverage in their rooms. It was usually followed by the comment that they did not have this problem at home or in other areas of the campus. After performing various test and wireless scans I am of the opinion that a good portion of these problems were introduced by the students themselves by bringing in various devices that emit 2.4 interference. I am curious about how any of you guys have addressed this problem and informed the students of these potential interferences. Have any of you added a section to orientation that discusses the problem of interference and did it have good results. Did any of you do a poster campaign with good results or did you issue a Faraday cage to each student to store their stuff in (yes that was a joke). I can only see this problem getting worse with wireless printers and game consoles that all have a potential to cause interference. I am open to any ideas and or suggestions. Thanks. Daniel Lay Networking Specialist Samford University ** 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/. -- Rick Coloccia, Jr. Network Manager State University of NY College at Geneseo 1 College Circle, 119 South Hall Geneseo, NY 14454 V: 585-245-5577 F: 585-245-5579 CIT will never ask for your password or other confidential information via email. ** 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/.
RE: [WIRELESS-LAN] Interference in dorms.
Yeah, that's what we do as well, but every year, I swear we have the same discussion re: these devices (which seems to be growing larger - recently had reports - that were confirmed - of a model of Visio TV that won't connect without the 1-2 Mbps rate) -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Timothy J. Fairlie Sent: Thursday, July 21, 2011 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. like Neil, we ended up telling them to get the wired adapter On 7/21/2011 2:36 PM, Gogan, James P wrote: That kinda begs the question then what DO you do about Wii's (for example)? Do you have 1-2 Mbps disabled? -- Jim Gogan UNC-Chapel Hill From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tim Fairlie Sent: Thursday, July 21, 2011 1:31 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. Yep, that was our experience with Wii's. Through experimentation we saw that once the Wii joined, if you disabled 2mpbs, they'd stay on...but they couldn't join if 2mbps wasn't on initially. Really weird Timothy J. Fairlie - Director Network/User/Telecommunication Services (N.U.T.S) Rider Universityfair...@rider.edumailto:fair...@rider.edu - Rick Coloccia coloc...@geneseo.edumailto:coloc...@geneseo.edu wrote: Be careful disabling 2 mbps. We were told at the Cisco conference in a wireless class just last week that the Wiis require 2mbps to successfully find and join the wireless network. I have not personally verified this, but the source is reliable... -Rick On 7/21/2011 12:58 PM, Johnson, Neil M wrote: We are struggling with the same issues. We are finding that X-boxes and PS3s generate lots of interference (they use a proprietary 2.4 protocol between the joysticks and console). This summer we've added over 100 AP to the dorms, moved several, changed our AP's antenna configuration, disabled 1 and 2 Mbps data rates, and are implementing channel layering (Meru) to try and address the issue. We are also planning on being more aggressive at getting rid of student installed wireless AP's. We are considering adding a 5GHz only SSID in the dorms to encourage users to use 5 GHz ( we do have band steering enabled, but a dedicated SSID would insure that devices only use 5GHz and not fall back to 2.4). We'll see what happens. -Neil -- Neil Johnson Network Engineer The University of Iowa Phone: 319 384-0938 Fax: 319 335-2951 Mobile: 319 540-2081 E-Mail: neil-john...@uiowa.edumailto:neil-john...@uiowa.edu From: Lay, Daniel dl...@samford.edumailto:dl...@samford.edu Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: Thu, 21 Jul 2011 11:16:29 -0500 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Interference in dorms. Last year we had several students that would complain about poor wireless coverage in their rooms. It was usually followed by the comment that they did not have this problem at home or in other areas of the campus. After performing various test and wireless scans I am of the opinion that a good portion of these problems were introduced by the students themselves by bringing in various devices that emit 2.4 interference. I am curious about how any of you guys have addressed this problem and informed the students of these potential interferences. Have any of you added a section to orientation that discusses the problem of interference and did it have good results. Did any of you do a poster campaign with good results or did you issue a Faraday cage to each student to store their stuff in (yes that was a joke). I can only see this problem getting worse with wireless printers and game consoles that all have a potential to cause interference. I am open to any ideas and or suggestions. Thanks. Daniel Lay Networking Specialist Samford University ** 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/. -- Rick Coloccia, Jr. Network Manager State University of NY College at Geneseo 1 College Circle, 119 South Hall Geneseo, NY 14454 V: 585-245-5577 F: 585-245-5579 CIT will never ask for your password or other confidential information via email. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ** Participation and subscription
RE: [WIRELESS-LAN] Interference in dorms.
Marketing's understanding of how wireless works: http://dilbert.com/strips/comic/2010-04-24/ -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Thursday, July 21, 2011 2:55 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. This is where media hype on BYOD being something we all have to live with, support, and wirelessly accommodate starts to feels silly. Dorm rooms are only so big, and for devices that can’t do secure WLAN, a jack is never very far away for us, and we too have disallowed lower data rates for years. It gets thornier for 100% wireless/no Ethernet environments, for sure. If need be, you could certainly accommodate the toys and lesser-capable wireless devices all day long, but it comes at an overall performance penalty and certainly throws the marketing math askew (Ten times faster! 20 times the range! Tastes great! Less filling!) which is fine, if you are willing to live with it. Wireless is a technology where it’s hard to have it all at the exact same instant in time, and it’s even harder to explain why this is the case to people. One man’s opinion on a hot day. -Lee Lee H. Badman Wireless/Network Engineer Information Technology and Services Adjunct Instructor, iSchool Syracuse University 315 443-3003 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU]mailto:[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Gogan, James P Sent: Thursday, July 21, 2011 2:44 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. Yeah, that's what we do as well, but every year, I swear we have the same discussion re: these devices (which seems to be growing larger - recently had reports - that were confirmed - of a model of Visio TV that won't connect without the 1-2 Mbps rate) -- jg From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU]mailto:[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Timothy J. Fairlie Sent: Thursday, July 21, 2011 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. like Neil, we ended up telling them to get the wired adapter On 7/21/2011 2:36 PM, Gogan, James P wrote: That kinda begs the question then what DO you do about Wii's (for example)? Do you have 1-2 Mbps disabled? -- Jim Gogan UNC-Chapel Hill From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tim Fairlie Sent: Thursday, July 21, 2011 1:31 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Interference in dorms. Yep, that was our experience with Wii's. Through experimentation we saw that once the Wii joined, if you disabled 2mpbs, they'd stay on...but they couldn't join if 2mbps wasn't on initially. Really weird Timothy J. Fairlie - Director Network/User/Telecommunication Services (N.U.T.S) Rider Universityfair...@rider.edumailto:fair...@rider.edu - Rick Coloccia coloc...@geneseo.edumailto:coloc...@geneseo.edu wrote: Be careful disabling 2 mbps. We were told at the Cisco conference in a wireless class just last week that the Wiis require 2mbps to successfully find and join the wireless network. I have not personally verified this, but the source is reliable... -Rick On 7/21/2011 12:58 PM, Johnson, Neil M wrote: We are struggling with the same issues. We are finding that X-boxes and PS3s generate lots of interference (they use a proprietary 2.4 protocol between the joysticks and console). This summer we've added over 100 AP to the dorms, moved several, changed our AP's antenna configuration, disabled 1 and 2 Mbps data rates, and are implementing channel layering (Meru) to try and address the issue. We are also planning on being more aggressive at getting rid of student installed wireless AP's. We are considering adding a 5GHz only SSID in the dorms to encourage users to use 5 GHz ( we do have band steering enabled, but a dedicated SSID would insure that devices only use 5GHz and not fall back to 2.4). We'll see what happens. -Neil -- Neil Johnson Network Engineer The University of Iowa Phone: 319 384-0938 Fax: 319 335-2951 Mobile: 319 540-2081 E-Mail: neil-john...@uiowa.edumailto:neil-john...@uiowa.edu From: Lay, Daniel dl...@samford.edumailto:dl...@samford.edu Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: Thu, 21 Jul 2011 11:16:29 -0500 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUmailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Interference in dorms. Last
Experiences with Cypress Envirosystems wireless product?
Our Utilities folks are looking at deploying the Cypress Envirosystems Wireless Pneumatic Thermostat system on campus for remote temperature monitoring and control. As is so often (too often?) the case with systems like these, (a) they use the 2.4GHz DSSS band (frequencies from 2.407 to 2.467 Ghz) and (b) they're not 802.11/Wi-Fi technologies, but rather their own wireless technology. Their literature maintains that Extensive testing has shown that our wireless solution has no discernable impact on other wireless technologies, such as Bluetooth and Wi-Fi, but for some reason, I tend to discount vendor testing that doesn't include all of their test methodologies or results. So, have any of you all had any experience with these devices and, if so, seen any impacts either from these devices on wi-fi or from wi-fi systems on these devices? (We get the blame no matter which way the impact.) According to the vendor, these systems are deployed at UCal-Berkeley, Clemson, Stanford and UCLA, so if there are any folks from those institutions out there, please let me know your experiences (or if you were even aware that these were out there). As always, thanks in advance! -- Jim Gogan Director, Networking / ITS University of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Android devices and DHCP issue
Was wondering how many other folks have run into the Android device/DHCP issue well summarized by the Princeton folks (http://www.net.princeton.edu/android/android-stops-renewing-lease-keeps-using-IP-address-11236.html) and what folks were doing about this.Rather surprising that it's still an on-going/open issue even though a case was opened on this about two months ago. Quick summary for those that haven't noticed: a large number of Android devices (both 2.1 and 2.2 firmware) don't try to renew their DHCP lease, but keep using the address anyway. DHCP server thinks the address is available, offers it to other clients, clients discover address is in use and send DHCPDECLINE, lease is abandoned and so on. What have folks found to be the best way to deal with those devices, short of an electromagnetic pulse? -- Jim Gogan ITS Comm Tech Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] Alternatives to XpressConnect
Like others, I'll throw in my $.02 here and indicate that not just something similar but, in fact, XpressConnect from CloudPath has INDEED been very beneficial here on our campus. With the diversity of desktop configurations and systems that we have, the seamless configuration of Windows PCs, Macs, Ubuntu systems, iPhones/iPod Touches/iPads with a single common-interface tool (and great support, by the way) for consistent deployment of 802.1X/WPA2-Enterprise cannot be beat. Great product - classic example of you get what you pay for. -- Jim Gogan Univ of North Carolina at Chapel Hill -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Jethro R Binks Sent: Thursday, April 22, 2010 5:57 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Alternatives to XpressConnect On Fri, 16 Apr 2010, Kevin Ehlers wrote: We're looking at deploying WPA/WPA2 and we think that something similar to XpressConnect from CloudPath would be very beneficial. However, in searching I have been unable to determine if there are any vendors offering a similar service. Does anyone know of a competitor to CloudPath in this area? Our current options are 1) writing our own application + all of the benefits and drawbacks that go with a homegrown solution, and 2) a vendor supported tool to configure client's machines. Any suggestions or alternatives are welcome. To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: Thu, 11 Mar 2010 08:49:58 + (GMT) Subject: Re: [WIRELESS-LAN] Automating WPA Setup On Tue, 9 Mar 2010, Julian Y. Koh wrote: At 10:38 AM -0600 3/9/10, Williams, Mr. Michael wrote: We have tutorials available for our users, but our helpdesk folks still have to spend a lot of time manually configuring the wireless supplicant for some of our less tech savvy users.Does anyone have a solution to this problem? Here at NU, our Technology Support Services coded up a Windows utility that we use for this purpose. http://www.it.northwestern.edu/oncampus/wireless/wireless-connections/ Here's another tool that might be of interest: http://sourceforge.net/projects/su1x/ Jethro. . . . . . . . . . . . . . . . . . . . . . . . . . Jethro R Binks Computing Officer, IT Services, University Of Strathclyde, Glasgow, UK ** 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/.
RE: [WIRELESS-LAN] Princeton determines cause of an iPad problem
So far, the majority of the iPads we've seen have the 7c:6d:62 prefix that we've also seen on some iPhones, MacBook Pros, iPod Touches, iMac, etc.; have also seen some d8:30:62 on iPads that we've also seen on iPod Touches So, t'ain't all that unique, unfortunately. -- Jim Gogan Univ of North Carolina at Chapel Hill -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Hao, Justin C Sent: Tuesday, April 20, 2010 10:43 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Princeton determines cause of an iPad problem The ipads we've seen before actually have a different oui prefix than the rest of apple's products. Don't know how unique though. --- Justin Hao j...@austin.utexas.edu University of Texas ITS - Networking On Apr 20, 2010, at 9:28 PM, Ryan Holland holland@osu.edu wrote: If the iPad is like the rest of Apple's product line, there's no way to distinguish it from other Apple products based on mac address. -- Ryan Holland Network Engineer, Wireless Office of the Chief Information Officer The Ohio State University 614-292-9906 holland@osu.edu On Apr 20, 2010, at 9:34 PM, Frank Bulk wrote: Another idea is provide long(er) lease times just to the Apple iPads, based on OUI. Frank -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Jeffrey Sessler Sent: Monday, April 19, 2010 10:28 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Princeton determines cause of an iPad problem It would seem that Princeton could temporarily (or permanently) avoid the problem, and thus all the media hype and blocking of the iPads, by simply increasing their DHCP lease time from their stated 1-3 hour time to something more reasonable. Unless your base of devices include a large number of drive-bys (devices seen only once and never again), I'm not sure that a lease time of 1-3 hours will result in better DHCP IP address pool use than say a lease time of 24 hours. We toyed with extremely short leases years ago but found they resulted it various device anomalies. We now run with lease times of at least 24 hours and our average IP address consumption changed very little. Jeff Zeller, Tom S 04/18/10 8:54 PM http://www.net.princeton.edu/announcements/ipad-iphoneos32-stops-renewing-le ase-keeps-using-IP-address.html iPad gets DHCP lease. If iPad happens to be sleeping during the renewal time it awakens and uses the IP number forever (until shut down of unit or WiFi or going out of range) Tom Zeller Indiana University ** 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/ . -- BEGIN-ANTISPAM-VOTING-LINKS -- Teach CanIt if this mail (ID 1028524510) is spam: Spam:https://antispam.osu.edu/b.php?i=1028524510m=8e500edfb024c=s Not spam:https://antispam.osu.edu/b.php?i=1028524510m=8e500edfb024c=n Forget vote: https://antispam.osu.edu/b.php?i=1028524510m=8e500edfb024c=f -- END-ANTISPAM-VOTING-LINKS ** 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/.
RE: [WIRELESS-LAN] Princeton determines cause of an iPad problem
There was an interesting study done at Ga Tech about 3 years ago (http://conferences.sigcomm.org/imc/2007/papers/imc17.pdf) on DHCP lease time optimization -- don't know if anyone has done anything more with this research or similar studies elsewhere, but would be interesting to know if there was. -- Jim Gogan Univ of North Carolina at Chapel Hill -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Jeffrey Sessler Sent: Monday, April 19, 2010 11:28 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Princeton determines cause of an iPad problem It would seem that Princeton could temporarily (or permanently) avoid the problem, and thus all the media hype and blocking of the iPads, by simply increasing their DHCP lease time from their stated 1-3 hour time to something more reasonable. Unless your base of devices include a large number of drive-bys (devices seen only once and never again), I'm not sure that a lease time of 1-3 hours will result in better DHCP IP address pool use than say a lease time of 24 hours. We toyed with extremely short leases years ago but found they resulted it various device anomalies. We now run with lease times of at least 24 hours and our average IP address consumption changed very little. Jeff Zeller, Tom S 04/18/10 8:54 PM http://www.net.princeton.edu/announcements/ipad-iphoneos32-stops-renewing-le ase-keeps-using-IP-address.html iPad gets DHCP lease. If iPad happens to be sleeping during the renewal time it awakens and uses the IP number forever (until shut down of unit or WiFi or going out of range) Tom Zeller Indiana University ** 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/.
question about PoE midspan devices
I know this question has been asked before, but it wasn't anything that was on our radar at the time and experiences may have evolved over time. We have a possible need for PoE midspan devices, not so much for APs, but for security cameras (which could number in the thousands before they're done) -- many of them to be located in buildings without any PoE Ethernet switches and with no life-cycle network funds on the horizon. Ideally, I'd like something that's SNMP-manageable and has ssh (ok, I'll settle for telnet) capability. 8-16 ports would be nice. Anything like that out there these days and, if so, what's the experience been with them? Thanks in advance. -- Jim Gogan Director, Networking Univ of North Carolina at Chapel Hill ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
