Re: [WIRELESS-LAN] Capacity of a Cisco 5500 series controller
Thanks for the responses guys. Eric..how many APs do you have on this controller?and.is it standalone or part of a mobility group? ...thx.J Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. From: "Eric T. Barnett" To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 09/16/2013 12:06 PM Subject:Re: [WIRELESS-LAN] Capacity of a Cisco 5500 series controller Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv Had 7100 users concurrent the other day at peak. Seems to be working ok. Eric Barnett Senior Network Engineer/Wireless Administrator Information and Technology Services Arkansas State University (870) 680-4243 http://wireless.astate.edu From: The EDUCAUSE Wireless Issues Constituent Group Listserv [ mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jamie Savage Sent: Friday, September 13, 2013 10:42 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Capacity of a Cisco 5500 series controller Hi all, Rarely can one take the published capacity numbers of devices at face value. The Cisco 5500 series wireless controller is rated to handle 'up to' 500 APs and 7000 concurrent clients. Has anyone pushed this device to capacity? If not, what limits have you decided on? ..thanks in advance..Jamie Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** 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/.
Capacity of a Cisco 5500 series controller
Hi all, Rarely can one take the published capacity numbers of devices at face value. The Cisco 5500 series wireless controller is rated to handle 'up to' 500 APs and 7000 concurrent clients. Has anyone pushed this device to capacity? If not, what limits have you decided on? ..thanks in advance..Jamie Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
measuring wireless availability?
Hi, We?ve been approached from above to provide an availability % of our wireless service on campus. We?re not sure what is meant by ?availability? and have pushed the question back for clarification. On the assumption that they?re asking for availability stats from a users perspective?.that?s a tough one. The fact that our wireless infrastructure equipment may be up 98.5% of the time does not mean that users are experiencing a quality service 98.5% of the time in all locations. Just wondering if anyone has come up with a reasonable way of looking at this in order to provide a number that's meaningful. ...thanks in advance..J Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
setting TX power levels
Hi, We're configuring our first Cisco thin AP deployment using AP3600s. In a particular high density coverage area we been requested to set the TX power levels to 12mW and 25mW for the 2.4/5.0 bands respectively. I've calculated that a setting of '4' should provide the 12 mW setting for the 2.4 but I'm somewhat confused about the 5.0. It appears that the max power in the 5.0 differs when using UNII-1 channels vs. UNII-2 channels vs. UNII-3 channels.Do I have this correct? thanks in advance.......J Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Wifi interference with lecture hall speakers
Hi, We're about to install wireless APs in a new lecture hall and I've just found out that our desired AP locations will be in close proximity to the lecture hall speaker cabinets. I've heard that there can be some interference between WiFi and speakers. Has anyone run into this? thanks...Jamie Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
old Bluesocket devices
Hi, We're looking for some stop gap captive portal equipment. Has anyone retired any Bluesocket 5000s or 5200s (preferably) that they would be willing to part with. Please contact me directly. ..thanks in advance..Jamie Jamie Savage | Senior Communications Technician | University Information Technology 010 Steacie Science Building | York University | 4700 Keele St. , Toronto ON M3J 1P3 Canada T: 416.736.2100 x22605 | F: 416.736.5830 | jsav...@yorku.ca | www.yorku.ca York UIT will NEVER send unsolicited requests for passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
GD code version for Cisco 4402 WLC
Hi all, We have a Cisco 4402 WLC that we've been running for a while with no major issues. The code we're running is 6.0.182.0 and figured perhaps it's time to upgrade prior to the school year. As nothing on the Cisco web-site is labelled GD, I was looking for recommendations for a stable version to move to. .thanks in advanceJ James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
WiFi on campus buses
Hi, We have two main campuses with a regularly scheduled shuttle bus running between the two. We've been asked to look into providing WiFi service on this bus. It appears the solution is a WiFi router with a cellular back-haul (3G?). If anyone is doing this I'd appreciate any comments as I see a number of issues..spotty cellular along the route (ie. service disclaimer required),, user density vs. available bandwidth (Netflix!!)etc. thanks in advance...J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Macbooks with odd Airport MAC addresses
Just went back in our logs and we had a few hits with this MAC last week. However, the DHCP records indicate that this one has something to do with Android?? Sep 22 16:01:50 x.xx.yorku.ca dhcpd: event=dhcp_offer&loglevel=info&msg=DHCPOFFER on 192.168.100.211 to 00:11:22:33:44:55 (android_9774d56d682e549c) via eth1 gw 192.168.100.2& The android reference here is the computer name which could have been entered by the user but the subsequent alpha string would indicate it's a generated name. thxJ James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: "Ingen Schenau, Jeroen van (ICTS)" To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 09/27/2010 10:02 AM Subject:Re: [WIRELESS-LAN] Macbooks with odd Airport MAC addresses Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv On Mon, 2010-09-27 at 09:39 -0400, Michael Dickson wrote: > Fascinating. We have one user on campus so far with this address: > > 00:11:22:33:44:55 > Vendor (reported by Airwave): CIMSYS Inc My ? 0.02: we've seen three distinct users with that MAC, over the past 7 days. Same when looking over the last 31 days. Regards, Jeroen van Ingen ICT Service Centre University of Twente, P.O.Box 217, 7500 AE Enschede, The Netherlands ** 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] iPAD dhcp issues - news?
Matt/Pete, Thanks for the link.it's interesting how Apple's a little light on the details Due to the 'stickiness' of dynamic DHCP IPs, I suspect we won't see a problem either until the fall when our wireless address space will see a dramatic increase in usage. James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: Peter P Morrissey To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 05/13/2010 11:15 AM Subject:Re: [WIRELESS-LAN] iPAD dhcp issues - news? Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv We haven?t seen any problems with it. In the mean time though, they do have an updated support article. Looks like you just need to ?Adjust screen brightness.? http://support.apple.com/kb/TS3304 Pete M. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [ mailto:wireless-...@listserv.educause.edu] On Behalf Of Jamie Savage Sent: Thursday, May 13, 2010 10:58 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] iPAD dhcp issues - news? Hi all, I was wondering if there was any news regarding a resolution for the Apple iPAD DHCP issue? It's been quiet in this group recently about this so I assume Apple is still working on it? I browsed around the Apple site but didn't find anything. When this problem was first reported I was hopeful that a fix would be available prior to the iPAD's Canadian launch (May 28th?)...oh well. James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** 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/.
iPAD dhcp issues - news?
Hi all, I was wondering if there was any news regarding a resolution for the Apple iPAD DHCP issue? It's been quiet in this group recently about this so I assume Apple is still working on it? I browsed around the Apple site but didn't find anything. When this problem was first reported I was hopeful that a fix would be available prior to the iPAD's Canadian launch (May 28th?)...oh well. James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Private IP space for wireless users- anyone?
Ken, /20 subnets?.I've always been concerned about such a large broadcast domain.iewe've not gone larger than /22. Have you done any special tweaking to facilitate the /20s or have they just worked fine as is? .thx...J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: Ken LeCompte To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 12/16/2009 08:11 AM Subject:Re: [WIRELESS-LAN] Private IP space for wireless users- anyone? Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv We are doing NAT/PAT at the edge with a firewall module in a 6500 for our 5000 peak logged in users. We use four /20's to break up those users across our wireless controllers. The wireless users are also not the only ones being NATed at that firewall module. All of the dorm wired users are NATed there too. Thanks. Ken -- Ken LeCompte - Telecommunications Analyst Rutgers University Office of Information Technology Campus Computing Services - Central Systems and Services Office ~ (732) 445-4823 On Dec 15, 2009, at 6:36 AM, Lee H Badman wrote: > Thanks for all of the responses- I wonder if anyone with a peak > usage like ours is doing NAT- almost 6500 clients? > > -Lee > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv [wireless-...@listserv.educause.edu > ] On Behalf Of Jason Appah [jason.ap...@oit.edu] > Sent: Monday, December 14, 2009 11:03 PM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] Private IP space for wireless users- > anyone? > > Yes, that is what we do. I just wondered how big if a bear it would be > to track pat in a university wireless environment. > > In a second related note, we recently changed our NAT timeout from 3 > to 2 hours as we were beginning to run out of 1 to 1 NAT ranges > > Sent from my iPhone > > Jason Appah > Systems Administrator > Oregon Tech > > On Dec 14, 2009, at 6:33 PM, "Phil Trivilino" wrote: > >> We do 1to1 dynamic NAT on the ASA firewall and log all the >> translations to a syslog server. Easy to get the private ip from >> the log given the time and global ip. It is all we've seen the need >> for to this point. >> Phil >> >> On Dec 14, 2009, at 8:55 PM, Lee H Badman wrote: >> >>> Wondering how many other schools are using private IP space for >>> wireless users, how you accomplish the NAT, and what mechanisms you >>> use for user tracking for the private-public mappings for forensic/ >>> investigatory purposes. >>> >>> Thanks- >>> >>> Lee >>> ** >>> 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/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Private IP space for wireless users- anyone?
Careful what you wish for..I can recall installing my first AP and wishing/watching for days until I got my first wireless user..now I wish they'd get lost!...;+) We peak at approx. 6000 IPs dhcp'd out but only approx 80% of those IPs are actually used. The rest are sucked up by devices whose radios are simply powered on. We still assign public IPs and are good for a while yet but there may come a day when PAT will be necessary. We try to make our subnets as large as we dare. Eg. A /22 subnet facilitates a more efficient use of IPs than 4 /24s. ..J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: Jason Appah To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 12/15/2009 11:00 AM Subject:Re: [WIRELESS-LAN] Private IP space for wireless users- anyone? Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv I wish we had your volume, 650 peak -Original Message- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [ mailto:wireless-...@listserv.educause.edu] On Behalf Of Lee H Badman Sent: Tuesday, December 15, 2009 3:36 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Private IP space for wireless users- anyone? Thanks for all of the responses- I wonder if anyone with a peak usage like ours is doing NAT- almost 6500 clients? -Lee From: The EDUCAUSE Wireless Issues Constituent Group Listserv [wireless-...@listserv.educause.edu] On Behalf Of Jason Appah [jason.ap...@oit.edu] Sent: Monday, December 14, 2009 11:03 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Private IP space for wireless users- anyone? Yes, that is what we do. I just wondered how big if a bear it would be to track pat in a university wireless environment. In a second related note, we recently changed our NAT timeout from 3 to 2 hours as we were beginning to run out of 1 to 1 NAT ranges Sent from my iPhone Jason Appah Systems Administrator Oregon Tech On Dec 14, 2009, at 6:33 PM, "Phil Trivilino" wrote: > We do 1to1 dynamic NAT on the ASA firewall and log all the > translations to a syslog server. Easy to get the private ip from > the log given the time and global ip. It is all we've seen the need > for to this point. > Phil > > On Dec 14, 2009, at 8:55 PM, Lee H Badman wrote: > >> Wondering how many other schools are using private IP space for >> wireless users, how you accomplish the NAT, and what mechanisms you >> use for user tracking for the private-public mappings for forensic/ >> investigatory purposes. >> >> Thanks- >> >> Lee >> ** >> 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/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] wireless DHCP lease time
We've been using 10 minute lease times from the outset. The majority of our wireless subnets are /24 with some /23. I'd love to introduce some /22 but historical management of our address space has made obtaining contiguous space problematic. The annoying issue for me is that, at peak times, 20-25% of our IPs have been DHCP'd to devices simply because they are powered on with active radios. The users of these devices have no intention of actually using the wireless network. James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: "Osborne, Bruce W. (NS)" To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 10/01/2009 05:11 AM Subject: Re: [WIRELESS-LAN] wireless DHCP lease time Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv Steve, We here at Liberty University tend to run 1 day lease times on our wireless network. Previous to our move to Aruba, we used /20s with fat 802.11b/g APs. I believe that the broadcast domain may have been some of the performance issue with our old system. We now use pools of /23 subnets. Since our controllers can handle 512 APs pr controller, we are currently running 16 /23 subnets in each pool. Bruce Osborne Liberty University From: Steve Hess [mailto:sh...@wheatonma.edu] Sent: Wednesday, September 30, 2009 2:53 PM Subject: Re: wireless DHCP lease time We run 4 /23's (one per class) with 4 day lease times. It's very tight right now for freshmen and sophomore's but lots of room for juniors and seniors. Each class is about 350-450 students. I'm looking to add another /23 per class to provide some head room. We run 4 day lease times for the forensic aspect of it. Definitely seeing more wireless devices this year. Upperclassmen are registering computers. Underclassmen are registering a computer (or two), an iPhone/iPod, and a gaming device. For those of you running the /22's and /20's, you don't see performance issues with broadcast domain's that large? Our wireless vendor (Alcatel/Aruba) highly suggested shrinking the broadcast domain (we had been running one /22 for all students). Steve heath.barnhart wrote: We run 30 minute leases for most of SSIDs, no problems. We saw an unexpected boost in wireless usage this semester though, and had to go from /22 networks to /20 to accommodate the new users and leave room for expansion. Heath Garrett Harmon wrote: We're running into some issues at the ramp up of a quarter with our DHCP lease time attempting to utilize the /24's we currently pool for our main essid. We moved from 1hr. to 30 minutes, but are still running out of leases occasionally. For instance, we have 160 users in a /24, but due to the transient nature of wireless/classes leases that are used for a brief moment the cycle isn't quite efficient enough. What is everyone else using for wireless DHCP lease times? I know I can just add another /24 to the pool, but the networks are not being utilized enough. We want to try 15 minutes but are wondering if we will start to run into issues related with that? Your input is greatly appreciated!! *Garrett Harmon* Network Engineer Office of Information Technology The Ohio State University 614.292.2122 (o) 614.747.5539 (c) ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. -- --- Steve Hess Network Administrator Wheaton College Phone: 508-286-3404 Fax: 508-286-8270 --- ** 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] separating 'types' of users
Thanks to all who responded.food for thought. One area that I was looking for a comment on (and no one did which is an answer in it's self). I was wondering if anyone segregates users types in the RF. egkeep students in the 2.4 and admin in 5.0 or with channel overlays (with virtual cell or multiple APs with micro-cell) with a particular channel for admin only and students on anotherthings like that. I assume by the lack of commentary on this type of thing, that we're not concerned about one group impacting the other when using multiple SSIDs on the same radio. Presumably, 11n speeds make this a non issue? ...thx.J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
separating 'types' of users
Hi, We're entertaining the idea of providing separate wireless services to our academic and admin communities. Currently, we have a single SSID that we broadcast campus-wide that everyone uses. We could simply provide separate SSIDs or perhaps provide separate SSIDs on separate channels (ie...RF separation of services as well). I presume there are other methods in use out there?? I'd be interested in hearing what others are doing in this regard. ..thanks in advance..J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] NAT/PAT
Oliver, Please include me in the list of users who are interested in your home-grown solution. I'd be interested in looking at any publishings .thanks in advanceJamie James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA From: Oliver Gorwits To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Date: 07/13/2009 10:48 PM Subject: Re: [WIRELESS-LAN] NAT/PAT Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Justin Hao wrote: > we use a home grown nat system, the built in cisco system doesn't > provide enough logging data/capacity. Same here, and just to add that we have put some work into successfully getting netflow out of Linux Netfilter/IPTables with NAT data, which allows our CERT to trace problem users. I hope to publish some of this later in the year so drop me a line off-list if you want a link sending on. Like others in the thread, we got to a /22 of public IPs and realised it was just never going to stop growing, so switched to NAT at that point. - -- Oliver Gorwits, Network and Telecommunications Group, Oxford University Computing Services -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFKW/IT2NPq7pwWBt4RAsilAJ9srb8rbejaPmGGFSkR1tHgCSVuYwCeO+pg 0xg5PFTDHlF70769MvjYdS0= =SWtn -END PGP SIGNATURE- ** 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/.
anyone using Air Marshal captive portal
Hi, Is anyone using a 3rd party captive portal software called Air Marshal by IEA Software (www.iea-software.com). I'm interested in how it works in a large wireless and/or wired deployment. .thanks in advance...J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Wireless-only in residence halls
We restrict on a per user basis as well. This is done in our pilot project 11n roll-out in one of our grad residences. We restrict them to 4meg bi-directional throughput. The decision was made to give res. users a similar service as to the 'best' they may experience with a broad-band Internet service at home. As it is our first kick at the 11n cat, we erred on the side of caution. IE.we'd rather be the good guys and increase throughput speeds if users weren't happy (no complaints yet) rather than be the bad guys and claw back the speeds after the fact for some unforeseen reason (your basic expectation management). Why go with n at all?..as others have suggested earlierthis was a green-field deployment so it made sense to do it now...cheaper than a possible retrofit later. .thx.J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5830M3J 1P3, CANADA Philippe Hanset Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 04/27/2009 12:20 PM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] Wireless-only in residence halls we do, but for visitors only. for all users: Our wish list to Aruba includes a "fair bandwidth" request. Instead of a permanent rule per user, it would be an automatic rule that would kick in when too much load is on the AP. QoS for 802.11n ! There is not point to restrict a user if the AP is not overloaded. Philippe On Apr 27, 2009, at 10:59 AM, Michael Dickson wrote: > So, for anyone who is offering 802.1n is anyone putting bandwidth > restrictions for per-role or per-user? > >Mike > > > Peter P Morrissey wrote: >> Thanks Matt, >> I ordered a Dell that has one of those. Looking forward to testing >> it. All of this confirms though that there is no compelling reason >> for us to move to 802.11n. I was worried that I wasn't using the best >> equipment for the testing that I've done thus far with a couple of >> vendors. The testing shows a little over 100mbps down and maybe 90 >> up, and that is peak in the best case scenario lab conditions with an >> expensive, good quality adapter and all 11n parameters tuned. With >> cheaper, consumer grade adapters it was much lower than that. And, I >> would imagine it is even lower yet in real world scenarios. We're >> also finding that the range is usually no better, and in some cases >> worse than a/b/g. We tend to deploy with a lot of density anyway, so >> that isn't a big problem for us, but it contradicts what we had heard >> about the technology. It just doesn't look like users are going to >> notice any difference between current generation 11n and a solid >> a/b/g environment. And, when considering the cost difference and >> increased support complications that are inevitable when deploying a >> new technology, it is hard to make a case for moving to 11n with any >> urgency. If anyone has done any testing shows better results, please >> share it. >> Pete Morrissey >> -Original Message- From: The EDUCAUSE Wireless Issues >> Constituent Group Listserv >> [mailto:wireless-...@listserv.educause.edu] On Behalf Of Barber, Matt >> Sent: Monday, April 27, 2009 9:49 AM To: >> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] >> Wireless-only in residence halls >> Hi Pete, >> They do not do 3x3. I don't know of any adapters that do besides the >> Intel 5300. >> I haven't done any extensive throughput testing with those adapters. >> In terms of actual, real-world use though, they are performing fine. >> We have a few dozen people using them without issues. >> Matt Barber Network Analyst Morrisville State College 315-684-6053 >> -Original Message- From: The EDUCAUSE Wireless Issues >> Constituent Group Listserv [mailto:WIRELESS- >> l...@listserv.educause.edu] On Behalf Of Peter P Morrissey Sent: >> Monday, April 27, 2009 9:29 AM To: >> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] >> Wireless-only in residence halls >> Do they do 3x3 MIMO? What is the best up/down throughput that has >> been achieved on them with channel bonding? Pete Morrissey >> -Original Message- From: The EDUCAUSE Wireless Issues >> Constituent Group Listserv [mailto:WIRELESS- >> l...@listserv.educause.edu] On Behalf Of Barber, Matt >> Sent: Monday, April 27, 2009 8:42 AM To: >> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] >> Wireless-only in residence halls >> Hi Bruce, >> We went with two different Linksys dual-band adapters, one PCMCIA and >> one USB. The USB is really only for the few desktops that some >> students bring in. We sell it (the WUSB600n) at our bo
wish list for next generation vendor selection
Hi, We're starting to look at the different vendors to move forward into the 11n business. We have a standard list (working towards an RFP) of needs/it'd-be-nice/wants dealing with WIFI compliancy, POE, authentication, management etc. etc. but I was wondering if anyone who has gone through this might be able to offer other not-so-obvious things to look for. Ideally, if someone had a list of what they looked for and wish to sharethat would be excellent. ..thanks in advanceJ James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Stable version of Cisco WLC code supporting the 1140?
We are currently running 5.2.178.0 on a single 4402 with the 1252s.no problems however, it's a small set-upie..no high density areas and not a lot of roaming. We are in the process of deploying a number of additional 1142s running off of the same WLC. Perhaps I'll have something to report soon, however, we've not seen a problem with our test 1142. James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA John Watters Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 04/01/2009 03:58 PM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] Stable version of Cisco WLC code supporting the 1140? We are fighting the same problem. I have a new building that will need 100+ APs. We were looking at the a/b/g/n Cisco 1142s. But I don?t get a good feeling from this list about the 5.x code, which is required for this LWAPP. We also use WiSMs. Unless the code that was just released (5.2.178) is much better, I am afraid that I will have to continue to use my old 1130s. -jcw - John WattersUA: OIT 205-348-3992 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Bob Richman Sent: Wednesday, April 01, 2009 2:26 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Stable version of Cisco WLC code supporting the 1140? Hello All, Recent (several months ago) posts left me understanding that no one is quite comfortable with a 5.x code version that supports the 1140 a/b/g/n AP. Has there been any changes with that? We use WISMs here at Notre Dame. Thanks! Bob Richman Network Engineer University of Notre Dame 574 631.8562 richma...@nd.edu ** 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] ceiling mounting APs
Thanks to all who responded. I'm told that all cabling will be run in conduit anyway, so I like the idea of bending the conduit to run down to the desired height terminating with an box. We will also have a cable tray snaking around the floors so we can hang them off of that or on short conduits running from the tray where appropriate. thx...J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Fred Archibald Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 01/23/2009 01:52 PM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] ceiling mounting APs We also have a new building about to open and some areas don't have a ceiling grid. In those areas we are doing a combination of wall mount and (under)cable tray mount. Fred Scholz, Greg wrote: > I like your idea for the rods suspended to below the mech equipment. > Also, are you using cable tray? If so is it below the mech equipment > and/or close enough to where you need the APs ? if so, hang them from that. > > > > I don?t necessarily like this idea but what about an antenna extension > cable ? leave the AP on the hard ceiling and extend the antenna to below > the mech equipment. > > > > Wall mount around the perimeter should work as well and/or on some of > the columns. Even with few walls I suspect the facility is not wider > than could be covered. > > > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:wireless-...@listserv.educause.edu] *On Behalf Of *Jamie Savage > *Sent:* Friday, January 23, 2009 1:26 PM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* [WIRELESS-LAN] ceiling mounting APs > > > > > Hi, > We have a new building currently under construction and we're > looking at how best to mount our APs once the site surveys etc have been > completed. This is an open concept building...ie...a few pillars but > not too many walls. It is also the first building we have where there > will be no drop ceiling.ieeverything's open up to the concrete > slab ceiling (12' ceilings). The easy answer is to simply mount the APs > to the slab but that would put them above the mechanical > infrastructure...ie...ductwork, lighting, pipes etc. How have others > deployed in such a situation. I foresee us mounting the APs on rods > suspended from the concrete slab that would hang down to a length that > puts the APs below the mechanical equipment. Other comments or > suggestions? > > .thanks in advance.J > > James Savage York University > Senior Communications Tech. 108 Steacie Building > jsav...@yorku.ca4700 Keele Street > ph: 416-736-2100 ext. 22605Toronto, Ontario > fax: 416-736-5701M3J 1P3, CANADA > ** 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/. fred.vcf Description: Binary data
ceiling mounting APs
Hi, We have a new building currently under construction and we're looking at how best to mount our APs once the site surveys etc have been completed. This is an open concept building...ie...a few pillars but not too many walls. It is also the first building we have where there will be no drop ceiling.ieeverything's open up to the concrete slab ceiling (12' ceilings). The easy answer is to simply mount the APs to the slab but that would put them above the mechanical infrastructure...ie...ductwork, lighting, pipes etc. How have others deployed in such a situation. I foresee us mounting the APs on rods suspended from the concrete slab that would hang down to a length that puts the APs below the mechanical equipment. Other comments or suggestions? .thanks in advance.J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Wireless Installation Process
We have a separate department (Infrastructure Operations) that handles all aspects of the campus connectivity networks (data, voice, cable TV). They do it all, fibre, twisted pair, coax as well as the physical installations of our network switches (we do the configurations). The install the APs and cabling including termination (jacks and switchroom x-connects etc.). Occasionally, they may out-source to a contractor for really big jobs. Under normal circumstances we can expect AP installations to occur within a couple of weeks max. but are also able to put a rush on specific installs if it's necessary. For brand new buildings we'll typically provide an educated 'guess' (plus a cover-our-butt % of over-kill) simply for budgeting purposes. However, we will do a shoe-leather survey when the building is pretty much complete and hope that our budgetary 'guess' covers the costs. J James Savage York University Senior Communications Tech. 108 Steacie Building jsav...@yorku.ca4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA "Case, Brandon J" Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 12/17/2008 10:02 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] Wireless Installation Process I'm curious as to how you all out there handle the actual physical installation of APs in your environments. Do you handle that within the same team that manages the wireless network or is it a separate group that installs the equipment? How do you go about having the data jacks installed? Just as an estimation, approximately how long does it take to have an AP installed? For buildings that are still in the planning phase, do you design the AP locations into the building based on CAD drawings ahead of time? Or do you perform an on-site survey after the building is open and then proceed with installation? Any and all comments are appreciated. Thanks, -- Brandon Case, CCNA Network Engineer, ITaP Purdue University ca...@purdue.edu Office: (765)49-67096 Mobile: (765)479-7597 Fax:(765)49-46620 ** 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] Cisco Wireless Location Appliance and Controller Code 5.X train.
We've just rolled out a single WLC running 5.1 code. No issues yet but we're deployed in a single residence complexie.not a high density user area nor a lot of roaming. Yes, we were dissuaded from 5.0 but were led to understand that 5.1 isn't bad (and it's not been so far in this scenario) James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA "WALLACE, DAVID" <[EMAIL PROTECTED]> Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 12/01/2008 11:57 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] Cisco Wireless Location Appliance and Controller Code 5.X train. Issue 1-->Here at Kent State we have just under 1200 ap's on 25 controllers. With the time involved we are looking at possibly upgrading from the 4.2.130 code to the 5.X code train. Upon are migration to the lite weight architecture we were warned off of the 5.X train. I have not heard of anyone locally running it yet, looking for some feedback and analysis. Issue 2--> Is there anyone on the list running multiple location appliances and could we have some feedback. ** 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] Cisco 11n users
should have mentioned that we're using 1252s to provide a/b/g/nJ James Savage York University Senior Communications Tech. 108 Steacie Building[EMAIL PROTECTED]4700 Keele Streetph: 416-736-2100 ext. 22605Toronto, Ontariofax: 416-736-5701M3J 1P3, CANADA -The EDUCAUSE Wireless Issues Constituent Group Listserv wrote: -To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUFrom: Jamie Savage <[EMAIL PROTECTED]>Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv Date: 11/11/2008 02:26PMSubject: Re: [WIRELESS-LAN] Cisco 11n usersHi, I would be very interested if this subject discussion was kept open to the group. We just turned on an 11a/b/g/n service using a single Cisco 4402 with 16 APs (soon to expand to the max 50 APs a single 4402 will allow. It covers a residence, so it's not a high density area nor would I expect a lot of roaming between APs. We're running Ciscos V5.1 of code while I understand that most folks are at 4.3? No negative reports (yet?) but we do have folks using it. This is our first stab at thin APs.we have 800+ 350s and 1121s. I'll be happy to try to answer any questionswe're still sort of new at this. thx.JJames Savage York University Senior Communications Tech. 108 Steacie Building[EMAIL PROTECTED]4700 Keele Streetph: 416-736-2100 ext. 22605Toronto, Ontariofax: 416-736-5701M3J 1P3, CANADA ** 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] Cisco 11n users
Hi, I would be very interested if this subject discussion was kept open to the group. We just turned on an 11a/b/g/n service using a single Cisco 4402 with 16 APs (soon to expand to the max 50 APs a single 4402 will allow. It covers a residence, so it's not a high density area nor would I expect a lot of roaming between APs. We're running Ciscos V5.1 of code while I understand that most folks are at 4.3? No negative reports (yet?) but we do have folks using it. This is our first stab at thin APs.we have 800+ 350s and 1121s. I'll be happy to try to answer any questionswe're still sort of new at this. thx.JJames Savage York University Senior Communications Tech. 108 Steacie Building[EMAIL PROTECTED]4700 Keele Streetph: 416-736-2100 ext. 22605Toronto, Ontariofax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Bluesocket users....redirect issue
Hi Dennis, Thanks for this report although it really muddies our situation as, why would it work for you and not us. It's not just a single device, I've seen it on 3 different ones. Please confirm that your flavour of Linus is Xandros? Trying different browsers has not helped either. Moving from Xandros to Ubuntu fixes the issue for us...weird. As far as I know the Bluesocket redirect is a canned applicationie.yours should work the same way as ours? I've also tried it on different version of Bluesocket code as well. .thanks for your time.J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Dennis Duncan <[EMAIL PROTECTED]> Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 11/06/2008 10:43 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] Bluesocket usersredirect issue I have had a Linux eeePC since April ?08 and it has always worked flawlessly with our Bluesocket environment. No problem with the login redirect. It just worked out of the box, didn?t have to change any configs. Maybe newer versions are different. HTH -- Dennis Duncan [EMAIL PROTECTED] Director, IT Infrastructure Services Concordia Collegehttp://www.cord.edu Moorhead, MN 56562 PH: 218.299.4192 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[EMAIL PROTECTED] On Behalf Of Jamie Savage Sent: Thursday, November 06, 2008 9:18 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Bluesocket usersredirect issue Hey fellow bluesocket users We are seeing more and more of these ASUS EEE little laptops on campus. I believe you can get them in a Windows and Linux version. The Linux version runs something called Xandros and we can't get these guys (with firefox) to redirect to the BSC login page. Traffic captures show that the BSC is doing its part butno redirect. We've found that changing them to Ubuntu seems to take care of things. Just wondering if anyone else has seen this issue and has already found a solution within the Xandros world? .thanks in advance..J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** 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/.
Bluesocket users....redirect issue
Hey fellow bluesocket users We are seeing more and more of these ASUS EEE little laptops on campus. I believe you can get them in a Windows and Linux version. The Linux version runs something called Xandros and we can't get these guys (with firefox) to redirect to the BSC login page. Traffic captures show that the BSC is doing its part butno redirect. We've found that changing them to Ubuntu seems to take care of things. Just wondering if anyone else has seen this issue and has already found a solution within the Xandros world? .thanks in advance..J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
[WIRELESS-LAN] stable code version for WLC ....5.1??
Hi, We're about to turn up a Cisco WLC based wireless service. From some of the discussions on this forum it appears that V5.0 had issues and folks were advised to go back to 4.X. The version we're running at the moment is 5.1. Can anyone comment on this versionis it stable?. All comments appreciated. ..thanks in advance.JJames Savage York University Senior Communications Tech. 108 Steacie Building[EMAIL PROTECTED]4700 Keele Streetph: 416-736-2100 ext. 22605Toronto, Ontariofax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
drywall mounting for Cisco Antennae
Hi all, We've just taken delivery of some Cisco APs (1252) and antennae (ant5140V and ant2430V). The antennae came with mounting clips for a t-bar ceiling but one area we're working with is a drywalled ceiling and I don't see an easy way to mount these antennae to drywall (unless I'm missing something obvious). Has anyone else dealt with this issueie...is there a 3rd party kit available? any suggestions are greatly appreciated..thx in advanceJ James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] University of Chicago Removes Wireless From Classroom
I understand that Meru does something called geo-fencing where by they can isolate rooms (using imported CAD floor plans) and use AP based triangulation to restrict users from associating in identified areas. I'd love to see it work.has anyone played with this? James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA "Zeller, Tom S" <[EMAIL PROTECTED]> Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 04/24/2008 02:29 PM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] University of Chicago Removes Wireless From Classroom My personal opinion is that it is not a good or even reasonable strategy to attempt to control WiFi in the classroom. For one thing, it's unlikely that an AP serves only a single classroom and no adjacent areas. Secondly, we can't control the cellular signal, so really there's not much benefit from a cheating standpoint. Tom Zeller Indiana University On 4/24/08 2:18 PM, "Lee H Badman" <[EMAIL PROTECTED]> wrote: http://news.uchicago.edu/news.php?asset_id=1329 Are any other schools up against anything of this magnitude? Has anyone come up with a mechanism to let faculty have some control over wireless in classrooms? -Lee Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** 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] Open Wireless in Higher Ed
We use a captive portal scenario with Bluesocket boxes. The Bluesocket boxes redirect the user to a login page and verifies the account/password combination via RADIUS. J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Daniel Bennett <[EMAIL PROTECTED]> Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 03/26/2008 07:54 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] Open Wireless in Higher Ed We are looking at technologies such as Radius, Cisco Clean Access, etc. to require our wireless client to authenticate to our network. Currently we have an open, unsecured wireless network. What are you Higher Ed institutions implementing to make sure that only valid users are using your wireless networks? If your policy is to do nothing then please indicate that as well. Thanks Daniel R. Bennett CompTIA Security+ Information Technology Security Analyst Pennsylvania College of Technology One College Ave Williamsport, PA 17701 (P) 570.329.4989 ** 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/.
[WIRELESS-LAN] Wireless 802.1x working well- now add NAC?
Hi, At these institutions where 802.1x is working well..do you control the types of wireless devices that the students use? We don't control the types of clients, so we're looking at providing wireless access for all flavoursieWindows, MAC, LINUX, various hand-helds.etc. Is it safe to say that anything 'recent' should work well with 802.1x? ..thx...J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
unusual? DHCP activity for wireless users
Hi, I've seen sporatic occurrences of the following; 1)a user starts a DHCP negotiation session with a discover etc. and obtains an IP address 2)the user will re-confirm the IP address at the half-life time of the lease 3)then the user will do a DHCP-request as if re-confirming the IP addressbut this does not occur at the half-life of the lease time...it seems to happen at random timesand then will occasionally reconfirm at the half-life time again. I'm assuming this is not a usual occurrence. I thought that this was a symptom of a user with a weak wireless signal and is therefore occasionally thinks it's lost the network. However, I would have thought that a device, once losing it's network would start the DHCP routine all over againstarting with a DHCP-discover, but this is not the case, the series begins with a DHCP-request from the users.I've seen this with XP and MACs... Has anyone else seen stuff like this?...is there any chance that this is normal (I suspect not as the user I'm monitoring right now with this behaviour is complaining about getting dropped etc.) thanks in advance...J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] The Aesthetics of 11n?
While we're not anywhere near ready to start deploying pre-11n products, we have had similar issues with architects. I suspect that what we found will apply to 11n devices as well. In a couple of new buildings, the architects were dead-set against the installation of any devices (Cisco 1100s in this case) on their walls. It wasn't long before the howls from the user community occupying these buildings overrode the architects. While attempts will be made to conceal these devices it will not always be possible but I have no doubt they will be installed wherever required.especially if 11n delivers as advertised. J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/17/2008 09:04 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] The Aesthetics of 11n? At risk of sounding silly- is anyone wrestling with the appearance of early 11n products? Contrast any of the current offerings with the MIMO antennas versus the likes of the Cisco 1130 (integrated antennas) from an aesthetics perspective, and the 11n stuff seems ugly and utilitarian. For us, we often need to get the architect?s blessing on ?fixtures? like this in new spaces, and the 1130 has been an easy sell because it?s not more obtrusive than a smoke detector. I don?t see any of the current crop off 11n APs being considered visually appealing to anyone other than us geek types. I wonder if 11n future APs will be able to do MIMO but still be ?pretty?? Lee Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** 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] 802.11n
exactly!...that's why I doubt any manufacturer would sign an agreement with the appropriate legalese guaranteeing the upgrade at this stage.the finalization of the standard is justl too far away James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lelio Fulgenzi <[EMAIL PROTECTED]> 01/11/2008 11:12 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] 802.11n Even if they do guarentee in writing, what recourse do you have? I'll bet you'd have to get legal reps involved before anything was drafted in order to be usable in court. Just my two cents. - Original Message - From: Jamie Savage To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Sent: Friday, January 11, 2008 11:07 AM Subject: Re: [WIRELESS-LAN] 802.11n .my thoughts exactly...guaranteed in writing please! James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/11/2008 10:55 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] 802.11n Actually, we did get a verbal commitment to that very notion yesterday from one of the more visible 11n vendors, but would have to see if that would be put in writing if we ever did proceed down that road. Lee From: Jamie Savage [mailto:[EMAIL PROTECTED] Sent: Friday, January 11, 2008 10:45 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n I'd be interested in results being posted on-list...I've not yet heard of any manufacturer who is guaranteeing free upgrades to the finalized standard...only,...'should be', 'probably' etc...etc.. I'd be surprised to hear that any of them would commit at this stage. .thx.J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/11/2008 10:39 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] 802.11n Wondering who is taking the early plunge on 802.11n, who?s system you are going with (beyond small pilots), and if you are requiring commitment from the manufacturer that if the standard does change in ways that make pre-standard hardware incompatible, free replacements would be provided? On list or off is OK- just trying to gather data for our own 11n research. Kind regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** 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/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] 802.11n
.my thoughts exactly...guaranteed in writing please! James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/11/2008 10:55 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] 802.11n Actually, we did get a verbal commitment to that very notion yesterday from one of the more visible 11n vendors, but would have to see if that would be put in writing if we ever did proceed down that road. Lee From: Jamie Savage [mailto:[EMAIL PROTECTED] Sent: Friday, January 11, 2008 10:45 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n I'd be interested in results being posted on-list...I've not yet heard of any manufacturer who is guaranteeing free upgrades to the finalized standard...only,...'should be', 'probably' etc...etc.. I'd be surprised to hear that any of them would commit at this stage. .thx.J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/11/2008 10:39 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] 802.11n Wondering who is taking the early plunge on 802.11n, who?s system you are going with (beyond small pilots), and if you are requiring commitment from the manufacturer that if the standard does change in ways that make pre-standard hardware incompatible, free replacements would be provided? On list or off is OK- just trying to gather data for our own 11n research. Kind regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** 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] 802.11n
I'd be interested in results being posted on-list...I've not yet heard of any manufacturer who is guaranteeing free upgrades to the finalized standard...only,...'should be', 'probably' etc...etc.. I'd be surprised to hear that any of them would commit at this stage. .thx.J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lee H Badman <[EMAIL PROTECTED]> 01/11/2008 10:39 AM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] 802.11n Wondering who is taking the early plunge on 802.11n, who?s system you are going with (beyond small pilots), and if you are requiring commitment from the manufacturer that if the standard does change in ways that make pre-standard hardware incompatible, free replacements would be provided? On list or off is OK- just trying to gather data for our own 11n research. Kind regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** 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/.
weird DHCP behaviour with wireless
Hi all, We're seeing this behaviour in our wireless network but it really relates more to DHCP than to wireless itself. Is anyone aware of DCHP client issues with any of the 'popular' latop operating systems. What I'm seeing is a wireless client asking for, and receiving, an IP address along with the usual DNS info and lease time etc. The client will renew the lease at the half-life time for a few cycles and then suddenly renew it's lease after a minute or, sometimes, after a number of seconds.ieseemingly ignoring the lease time it was given. I haven't looked to deep yet on the hope that someone is already aware of a DHCP client issue of some sort. thanks in advance..Jamie James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Wifi Location based Access Control
I recently sat through a Meru presentation where they discussed the fact that they could do this. I believe it works by comparing triangulated client locations to your CAD floorplans.you might want to check with them. However, it sounds like you're not looking to replace all of your wireless infrastructure (ie.I think you'd need to use all Meru hardware to use this solution) J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA "Urrea, Nick" <[EMAIL PROTECTED]> 10/09/2007 02:07 PM Please respond to The EDUCAUSE Wireless Issues Constituent Group Listserv To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] Wifi Location based Access Control We at UC Hastings are looking for a solution to create physicall boundries inside our wifi network. We would like to shut out the Students from using our wifi network in our classrooms but not in study areas. Our buildings are located in downtown SF and have study areas located next to classrooms NewBerryNetworks has a product that does wifi location based Access Control. If a client is found to be located in an area that we don?t want the client to have access to the wifi network the client is blocked at the proxy or Authentication firewall. Does anybody know of any solutions besides NewberryNetworks for locking students out of classrooms that doesn?t involve scheduling? We have already looked at a scheduling solutions to deny access. Nicholas Urrea IT Support Specialist UC Hastings College of the Law [EMAIL PROTECTED] x4718 ** 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/.
B user in a G cell
I always understood that 802.11G provides connection rates of 54 meg. but realistically has usable throughput of ~24meg. Also, if a B radio associates to a G AP then the usable throughput drops to ~8 meg. I was advised today that, due to recent enhancements (within the last year?), a B user in a G cell no longer lowers the bandwidth <24meg. for all G users in the cell. It doesn't sound right to me.can anyone comment on these 'enhancements' (if they do exist?) ..thx.J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Bluesocket timestamp inconsistencies?
Hi Mike, Yup...I patched all of my BSCs and a couple of them were showing the same behaviour. IE.the log-server stamp and the BSC stamp were off by an hour. I patched all of my BSCs during the wee-hours of a Sunday morning so I may have forgotten to reload the few that exhibited this behaviour. Anyway, I scheduled a reload early the next morning and now they are all logging with the correct times. I'm running 5.2.0.14 with the same Time patch you've mentioned. ..thx...J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Michael Dickson <[EMAIL PROTECTED]> 03/20/2007 02:14 PM Please respond to "802.11 wireless issues listserv" To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] Bluesocket timestamp inconsistencies? Hi all, I wonder if anyone using Bluesocket is seeing the same inconsistencies that we are seeing regarding EDT or any non-UTC time zone. After dutifully patching our Bluesocket 5000 boxes for the new Daylight Saving Time we are seeing an inconsistency between the time reported by Bluesocket and the logs. The Bluesocket box reports the correct EDT time (in the General->Time tab), but it logs all events an hour earlier to both the internal log table and to an external syslog server. We are running software image V5.3.1.11 with patch "TimeZoneUpdate release 1" as the only patch. My thought is that the time zone patch fixed the software issues but not the underlying linux-based OS time (tz-update?). I also assume that this problem magically goes away in two weeks. To eliminate the inconsistencies we moved to UTC but were wondering if anyone is seeing this occurrence. Thanks, Mike Dickson Network Analyst - OIT - Network Systems and Services University of Massachusetts Amherst ** 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] using four channels instead of three
Hi, Yes, we've adopted it in a scenario where we share a building with another institution. They use 2 channels and we use the other 2it works for us. I think you'll find that it's a fairly common type of deployment. ..thx...J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED]4700 Keele Street ph: 416-736-2100 ext. 22605Toronto, Ontario fax: 416-736-5701M3J 1P3, CANADA Lelio Fulgenzi <[EMAIL PROTECTED]> 01/01/2007 09:58 PM Please respond to "802.11 wireless issues listserv" To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject [WIRELESS-LAN] using four channels instead of three I ran across this article a while back (I'm pretty sure it was a result of searching the list archives) and I'm wondering if anyone out there has adopted this method in practice. http://findarticles.com/p/articles/mi_zdext/is_200211/ai_ziff33684 4 Simultaneous Channels Okay For 802.11b ExtremeTech, November, 2002 by Jim Louderback Note: Last summer, before starting here at Ziff Davis Media, I did some work with a small 802.11b startup called Cirond. The following story is based on a white-paper analysis done by CTO Mitch Burton. After I read it, I wanted to tell the world. I'll make no claims on whether Cirond's forthcoming products are useful, but its Channel Overlap analysis is exciting. But in the interest of full disclosure, note that they did pay me for some of the work I did ? although that was almost six months ago. So take this story with the proverbial grain of salt. I find it exciting, you may not. Current thinking in the 802.11b wireless space is that only three of the 11 channels used by wireless hubs in the US can be allocated simultaneously. But that's wrong, according to Mitch Burton, CTO of Cirond Networks. In fact, 4 of the 11 channels in North America, and 5 of the 13 in Europe can be safely used without significant interference or crosstalk ? and this has significant ramifications for multi-access point deployments. In North America, the 802.11b spectrum ranges from 2400MHz to 2483MHz, and is divided up into 11 channels from 2412MHz to 2462MHz, spaced 5MHz apart. Thus However, each channel is 22MHz wide, so as you can imagine, there is great overlap. Channel 1, for instance, is centered at 2412MHz, but extends out from 2401MHz to 2433MHz. Channel 6 is centered at 2437MHz, extending from 2426MHz to 2448MHz. In a multi-access point installation, where overlapping channels can cause interference, dead-spots and other problems, Channels 1, 6 and 11 are generally regarded as the only safe channels to use. Since there are 5 5MHz channels between 1 and 6, and between 6 and 11, or 25MHz of total bandwidth, that leaves three MHz of buffer zone between channels. Note that wireless access points generally radiate waves in a sphere around the access point, attenuated by walls, cubicle material, ceilings and floors. With just three channels to work with, it can become difficult to deploy wireless access around a single or multi-floor location while only reusing those 3 frequencies This picture shows how you would have to overlap Access Points with only three channels on a single floor: It's possible, but when you add in a third dimension, it starts to not work out: You cannot have two access points per floor in this scheme, which makes adding wireless into a multi-floor building a very tricky prospect. But what would happen if you could have four non-overlapping channels instead of three? Your flat access point distribution pattern would look like this: And your 3D distribution across different floors gets much easier: Now each floor can have two access points within the same coverage area, and not interfere with each other. This is a much easier set up to design, plan and maintain. But according to conventional wisdom, a four channel model involves overlap and interference, per the chart below: Channel Start Fqy Mid Fqy End Fqy 1 2401 2412 2423 4 2416 2427 2438 8 2436 2447 2458 11 2451 2462 2473 Channel 1 ends at 2423MHz, while channel 4 starts at 1416MHz, and that's a significant overlap. Channel 4, for example, only has 13MHz of its 22MHz unimpeded by overlapping frequency. But a standard mathematical analysis misses two fundamental aspects of wireless frequency use patterns of 802.11b equipment. First, an entire 22MHz is not simply swallowed up in a rectangular pattern with power on the vertical axis and frequency on the horizontal ? instead it's more of a parabola, centered around the midpoint of the frequency. Thus, as you get further away from the center, the power drops off substantially. According to Burton's analysis, when three channels separate 802.11b frequencies, there is only about 4% of interference. This is the case between frequencies
wireless IP addressing
Hi, 'Way back when' we first deployed wireless we weren't exactly sure where it was going so the decision was made to give all wireless users their own public IP. Of course, due to it's popularity (currently ~2000 concurrent users and growing) we're concerned about running out of IP addresses. I'm wondering what others are doing to address this? I asked a similar question back in 2004 referring to the coverage of large lecture halls and received the following suggestions; 1) run NAT (which I refer to as PAT in this case)ie...one public IP address for many users translating ports to private IPs for users on the 'inside' apparently PAT causes issues for IPSEC connections and is an issue for those wishing to run servers but I'd love to hear from others who are doing this regarding pitfalls, do's and dont's, other things that PAT 'breaks'etc. 2) create larger subnets, /21 was suggested (we currently use /24) ...I'd be concerned here about the large broadcast domain. In 2004 there were a couple of comments that no problems were experienced with ~1200 users.is this still the case? Any other issues to be aware of? In another but similar vein. In our set-up a user with a powered up wireless device is DHCP'd an IP address whether or not they intend to use the wireless service. They continually renew the lease on this IP as long as they remain in radio contact. As a result a significant percentage of our IPs are wasted by these users. I don't see a way around this but perhaps others have some suggestions? .all comments greatly appreciated...thanks in advance..Jamie James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED] 4700 Keele Street ph: 416-736-2100 ext. 22605 Toronto, Ontario fax: 416-736-5701 M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
wireless 'clickers'
We're currently investigating a Group Response System where a class of students would be given wireless response keypads where they would enter various thingsanswers to questions etc. This particular system runs in the 2.4ghz range (of course) and although the company claims minimal interference.I'm wondering. They claim, that because their units use fixed frequency (as opposed to spread spectrum) and can be configured to use 1 of 82 channels of 1 MHz in width, they can work on channels 'in-between or above the non-overlapping WLAN hotspots' channels. In the non-overlapping WLAN scenario they say they can be configured to avoid interference which I read to mean..they can't completely eliminate interference. Has anyone had experience with these types of devices? .thx.Jamie James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED] 4700 Keele Street ph: 416-736-2100 ext. 22605 Toronto, Ontario fax: 416-736-5701 M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] spectrum analyzers
Thanks to Chip and all others who replied. Just curious if there are any Yellowjacket users who'd like to comment. thx..J James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED] 4700 Keele Street ph: 416-736-2100 ext. 22605 Toronto, Ontario fax: 416-736-5701 M3J 1P3, CANADA "Greene, Charles" <[EMAIL PROTECTED]> 10/21/2005 03:36 PM Please respond to "802.11 wireless issues listserv" To WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU cc Subject Re: [WIRELESS-LAN] spectrum analyzers Jamie, At UofR, we have an Avcom spectrum analyzer and the AirMagnet Laptop analyzer. The AirMagnet analyzer is definately more user friendly than the Avcom, and it comes with the decodes of what is in the spectrum. Without these decodes, it is more difficult to determine what is causing the rf noise. For people not familiar with decoding actual RF signals, and knowledge of the RF spectrums, the AirMagent is easier to use and shows a lot of valuable information. The downside of the AirMagnet analyzer is the sweep rate is extremely slow, (they scan the entire 1G spectrum per sweep), which can be annoying whne you are trying to find a device in a specific range. Being an avid user of both analyzers, my belief is that the AirMagnet is good for basic troubleshooting and identification. But, if you are looking to get specific radio footprints of a device (ie. qwizdom, bluetooth, zigbee), and try to determine the power output and the effect the device may have on your network, then the Avcom spectrum analyzer is better. As I mentioned earlier, I get good use from both platforms, but the AirMagnet is the best for general troubleshooting. Also, I believe the list price of the Airmagnet of ($4995US) includes the card, and the list price of the Avcom PSA-37xp is $3795US. Hope this helps. Chip Greene Network Services University of Richmond -Original Message- From: Jamie Savage [mailto:[EMAIL PROTECTED] Sent: Fri 10/21/2005 3:15 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Cc: Subject: [WIRELESS-LAN] spectrum analyzers Hi all, I was just looking at a glossy of AirMagnet's spectrum analyzer. It's software that runs on a laptop with a wireless cardienot a typical spectrum analyzer. I was wondering if anyone had one of these. I'm guessing that it may be a little more user friendly (for those not well versed with these things) and tailored specifically for wireless environments than a standard unit. I have no idea of $$$ yet above the cost of the laptop and card. ..comments anyone?...other suitable options?...thanks in advance..Jamie James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED] 4700 Keele Street ph: 416-736-2100 ext. 22605 Toronto, Ontario fax: 416-736-5701 M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
spectrum analyzers
Hi all, I was just looking at a glossy of AirMagnet's spectrum analyzer. It's software that runs on a laptop with a wireless cardienot a typical spectrum analyzer. I was wondering if anyone had one of these. I'm guessing that it may be a little more user friendly (for those not well versed with these things) and tailored specifically for wireless environments than a standard unit. I have no idea of $$$ yet above the cost of the laptop and card. ..comments anyone?...other suitable options?...thanks in advance..Jamie James Savage York University Senior Communications Tech. 108 Steacie Building [EMAIL PROTECTED] 4700 Keele Street ph: 416-736-2100 ext. 22605 Toronto, Ontario fax: 416-736-5701 M3J 1P3, CANADA ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Jamie Savage is out of the office.
I will be out of the office starting 06/15/2005 and will not return until 07/04/2005. I will respond to your message when I return. If this is an urgent request please re-direct to [EMAIL PROTECTED] ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
