Re: [WIRELESS-LAN] Cisco WLC dynamic channel assignment (DCA) interval

[Jeffrey Sessler]

The original DCA algorithm prior to 6.0 code was problematic if you had a lots of APs. A change to a single AP could result in a cascade change to the rest of the radios in the same RF neighborhood. This could happen within a building, or if AP's in adjacent building could see each other, even campus wide.    A lot of changes were made in 6.0 and beyond to minimize the problems. There is a hop limit on adjacent APs that will change, and changes are no longer based on the single worst radio. In theory, the defaults as they are today in 7.x code should work pretty well now.   Jeff >>> On Thursday, October 03, 2013 at 11:06 AM, in message <of9304ac17.74c680d4-on87257bf9.0063110d-87257bf9.00637...@mtroyal.ca>, Craig Eyre <ce...@mtroyal.ca> wrote: I sent ours to change once every 24 hours but made sure I set it at 5am. This way the channels will change at 5am when there is less likelihood of affecting anyone. Depending on your channel sensitivity you could see alot of ap's flipping channels throughout the day if its set for 10 minutes but I could be mistaken.  I understand there will be alot less "random" access points at 5am as well but I'm more concerned about the rogues/surrounding area permanent ones. Craig Eyre           Network Analyst IT Services Department Mount Royal University 4825 Mount Royal Gate SW Calgary AB T2P 3T5 P. 403.440.5199 E. ce...@mtroyal.ca "The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will."  Vincent T. Lombardi Mark Duling ---10/03/2013 11:59:57 AM---A long time ago I increased the interval for this up to a pretty high setting from the default (I th From: Mark Duling <mark.dul...@biola.edu> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU, Date: 10/03/2013 11:59 AM Subject: [WIRELESS-LAN] Cisco WLC dynamic channel assignment (DCA) interval Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> A long time ago I increased the interval for this up to a pretty high setting from the default (I think it was 10 min) at the suggestion of TAC engineer to stop them from changing channels so frequently. 802.11x > RRM > Dynamic Channel Assignment (DCA) I have no evidence that there is any issue with it, but a lot has changed since then.  What intervals do others use for DCA? ********** 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/.