On 03/07/2012 01:17 PM, leo song wrote:
Assigning smart phones to specific subnets which has short DHCP lease time
doesn't seem like a long term or sustainable
solution, we are trying to implement PAT on campus wide wireless networks soon
to address the public IP shortage
challenge, while keep fingers across for the tracking & logging issues.
On the other hand, I am just pondering whether those smart phone really require
campus wireless services in the long
run, or they'd better off to carrier?
Some of us (probably the minority at this point) have lousy cell coverage on
campus.
I am hoping there will be some in-depth analysis of research on this, especially
on the client expectations and costs comparison perspective.
Certainly from the point of view of the user (student, faculty or staff), it's cheaper to spend less money on a smaller
monthly data plan (or none at all?) and try to connect to wifi whenever possible if there's no extra charge from the
school (or coffeshop, or ...) for wifi access.
~c
On Wed, 2012-03-07 at 09:57 -0800, Pham, Loc wrote:
Marcelo,
The Aruba feature that allow fingerprint on the devices, do you have to pay
extra for it to be functional ?
I hope our Cisco BU is listening ;-)))
Regards,
Loc Pham, CCIE
office 415-353-4492
IT Enterprise Security& Services
UCSF Medical Center
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Marcelo Lew
Sent: Thursday, February 02, 2012 10:17 AM
To:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] School blocks Wi-Fi access to smartphones to
address IP usage issues
Smartphones were killing us this quarter. While we only have 3500-3800
concurrent daily users, we have about 6500 devices connected. Most of these
extra 3000 devices were smartphones that come online for less than a minute,
and then go idle again. With our 30m DHCP renew times, we were exhausting our
5500 public IP pool for our main SSID. Instead of moving to private space
(which most likely we will in the near future), we added 6 more class c
subnets. We are now NOT running out of IPs, at least for a short while. We
also thought of making the DHCP lease times very short (like 5 minutes), but
our DHCP admin is uncertain what issues might arise from this. Another option
we are thinking about, the new Aruba code allows fingerprinting devices before
they are placed on a subnet, so we could put all smartphones in specific
subnets with short lease times, and leave the rest of the devices (pads,
netbook, notebooks, etc) on regular subnets with average DHCP lease times.
Marcelo Lew
Wireless Enterprise Administrator
University Technology Services
University of Denver
Desk: (303) 871-6523
Cell: (303) 669-4217
Fax: (303) 871-5900
Email:m...@du.edu <mailto:m...@du.edu>
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jonn Martell
Sent: Thursday, February 02, 2012 9:22 AM
To:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] School blocks Wi-Fi access to smartphones to
address IP usage issues
I agree, the school newspaper only shows it from a user's perspective.
"The smartphones are shutting down the network" while it's more"the network has
run out of public address space and the use of private address space on this network is
_______"
We all know the major flaw in using private address space is logging and
tracking but there are solutions to this. Shutting down access (by MAC block
ID?) would not be one of mine.
Jonn Martell, speaking as a network instructor and Director but not on behalf
of the Universities I work at....
On Thu, Feb 2, 2012 at 8:00 AM, Frank Bulk<frnk...@iname.com
<mailto:frnk...@iname.com>> wrote:
> http://www.vsuspectator.com/2012/02/02/outage-linked-to-usage/
>
> Looks like VSU had to make some hard choices and is blocking Wi-Fi
> access by smartphones. Not sure why they couldn't add another RFC
> 1918 block, but I'm sure there's more going on than the school paper shared.
>
> Frank
>
> **********
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Leo Song, Senior Analyst & Cluster Lead
Computing and Communication Services - Networking and Security
University of Guelph
(519) 824-4120 <callto:+1%28519%29%20824-4120> x 53181
********** Participation and subscription information for this EDUCAUSE
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