I like the idea of limiting based on usage and time. The incident involving the 1 TB of data was a connection between a Mac and a Time Capsule connected to the same AP using Time Machine. The data never traversed our internet connection.
Most of the problems we are experiencing could be solved if we limit heavy users after a certain amount of time. Nicholas Urrea Information Technology UC Hastings College of the Law [email protected] x4718 -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Ammar Abdulahad Sent: Friday, April 23, 2010 9:10 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Limiting Bandwidth on Autonomous APs Nick, With BlueCoat packet shaper, you can use dynamic partitions for the dorm subnet to insure fairness to a certain extent. Or you can setup a partition to limit the backup traffic. If the backup traffic is encrypted then it's game over unless you want to use adaptive response, so when a user hits a certain amount of bandwidth you classify his traffic and put him in a partition with lower bandwidth for a limited time period you define (I haven't done this with the packet shaper but I know it is doable). Ammar Abdulahad Wireless/Network Analyst Lawrence Technological University On Fri, Apr 23, 2010 at 11:43 AM, Jeffrey Sessler <[email protected]> wrote: > It's unlikely that QoS is going to solve this problem unless you can properly > classify the backup data from everything else. Depending on the age/type of > the AP, it's firmware, and the clients connected to it, ensuring fair use of > the radio may be more of a problem than the amount of traffic being passed. > Packet shaping is one alternative, but that's assuming it's a data capacity > and not a radio fairness issue. > > > You may simply be at the point of exceeding your current wireless design, and > it may be time to look at a upgrading to 802.11n, increasing AP density, or a > combination of both. > > > In my residential areas, since 2003 we've provide wired gigabit connections > to our students, yet they prefer the freedom of our WiFi network. Given the > trend, we designed and deployed our new WiFi network with capacity and not > coverage as the primary factor. The design resulted in a dense AP deployment, > providing a dual-channal 802.11n AP per ~7-12 residential students. > > > A dual-channel AP per ~7-12 users may seem excessive to some, but the reality > is that WiFi is now the primary/only network for the majority of our > students, and as such, it needs to perform at an appropriate level. If a > student want's to transfer 1TB or data, stream movies, edit photoshop files, > etc. the wireless design/network shouldn't be a limiting factor. > > > Jeff > > > > > >>>> "Urrea, Nick" 04/22/10 9:47 AM >>> > We are experiencing a problem in our dorm where one wireless user will > use all of the Available bandwidth on an 802.11g Autonomous AP's radio. > We are currently using a Bluecoat Packeteer packet shaper to shape > traffic at the Internet. The problem I have seen is with user on-line > backups, either to a Time Capsule (student moved a terabyte of data in a > month) or to (mozy, Backblaze, etc.). We receive complainants that the > Internet is slow. I am new to setting up QoS on cisco devices. > > > > Is there a way of limiting through QoS on an AP, so that if a student is > using all of the radio's bandwidth other users using the same AP have a > fair share of bandwidth? > > > > I would prefer not to rip and replace our 802.11g APs for 802.11N APs. > > > > Any other ideas are welcomed. > > > > Nicholas Urrea > > Information Technology > > 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/. > ********** 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/.
