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/.
