I agree with Lee The challenge is to create physically small cells to support throughput requirements. If the APs are in an open room with nothing between them - the management system is killing itself trying to adjust for co-channel interference. Cisco RRM will shut them down to the lowest power setting which still may not be enough for the three channel 2.4 Ghz channel selection. Anything you can do to create some RF barriers (or segmented antenna patterns between APs and users will help. Of course Xirrus will tell you their pizza slice antenna array will solve all your problems.... ;-)
On Wed, Nov 28, 2012 at 9:23 AM, Gogan, James P <[email protected]> wrote: > We currently have a mix of Cisco (legacy) and Aruba (last two years) APs > (although we're good at keeping any given building single brand, as much as > possible). We've generally gone with an engineering rule of thumb of > 20-30 clients per access point.**** > > ** ** > > We've noticed issues with channel flapping and inadequate load balancing > on our Aruba APs in large classrooms where we have, based on our client per > AP engineering, large numbers of APs. After an on-site visit from an > Aruba engineer, his comment was that we have TOO MANY APs in our classrooms > and high density areas. His recommendation (using the Aruba AP135s) was > that we design based on 80 clients per AP (minimum 50, average 80, max > 100), and to design based on 50 clients per AP for the older AP125s.**** > > ** ** > > I'd be curious to know what others think about that recommendation -- > seems pretty significantly different from everything we've been told and > designed for in the past. (BTW, the engineer also noted that he's not a > sales guy and the sales guys would suggest differently -- figures).**** > > ** ** > > Thoughts?**** > > ** ** > > -- Jim Gogan**** > > ITS-Networking**** > > Univ of North Carolina at Chapel Hill**** > > ** ** > > ** ** > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > -- Ron Walczak PMP, RCDD, CWNA/CWSP Walczak Technology Consultants, Inc (724) 865-2740 "Worry looks around; sorry looks back; faith looks up; virtue looks forward" - Unknown "Not to speak is to speak. Not to act is to act." - Dietrich Bonhoeffer * ** * "The great aim of education is not knowledge but action." *- Herbert Spencer * * **Anyone can count the seeds in an apple; but only God can count the apples in a seed*. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
