In response to my question yesterday, a Cisco engineer who is heavily involved in RRM sent me information in response to my question which has been very helpful to me in understanding what is occurring and whether I should be making any changes based on what I am observing. If you would like for me to forward this information to you please let me know and I will be happy to. I will tell you that he confirmed what one person had stated in one of the earlier emails that at code above release 6 there is no good reason to change the default interval.
Don Sullivan Network Administrator | Office: 205.726.2111 | email: [email protected] -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Dennis Xu Sent: Friday, October 04, 2013 10:34 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Cisco WLC dynamic channel assignment (DCA) interval There was a post on Cisco support forum about DCA interval and some senior contributors (not Cisco guys though) suggested to set it to 24 hours. I tried to search for it now but could not find it. We did have the AP channel change issues which affected about 50 APs at once. We thought the default 10 minutes interval is too aggressive and 24 hours is too long. We started with 1 hour to see how it went and we haven't had any issues. --- Dennis Xu Analyst 3, Network Infrastructure Computing and Communications Services(CCS) University of Guelph 519-824-4120 Ext 56217 [email protected] www.uoguelph.ca/ccs ----- Original Message ----- From: "Don Sullivan" <[email protected]> To: [email protected] Sent: Thursday, October 3, 2013 3:48:08 PM Subject: Re: [WIRELESS-LAN] Cisco WLC dynamic channel assignment (DCA) interval Can I ask what led to making this change? I am struggling trying to understand moving from a default of 10 minutes to 24 hours and the impact. I have been reading the documentation and reference for this setting in trying to determine if this is something I should implement but there is very little detail concerning the timer/interval. Based on the replies, 24 hours seems to be the choice and yet I cannot find through a google search why this is better. Appreciate any feedback given. Thanks, Don Sullivan Network Administrator | Office: 205.726.2111 | email: [email protected] -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Mark Duling Sent: Thursday, October 03, 2013 1:00 PM To: [email protected] Subject: [WIRELESS-LAN] Cisco WLC dynamic channel assignment (DCA) interval 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/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
