We've been using dfs channels for a while (not 144) and it's worked well for us. We stick to 40mhz channels (20 in very dense areas).
An area of debate among the hardcore wifi people is arm (rmm), the old schoolers say never use it, but the newer generation seem to be ok with it (with validation testing). We use it and are happy with the results (after testing and validation). Another area of debate is whether or not to use 2.4ghz (B data rates). The engineers we use for testing and validation have made a strong case that it's better left on (since we have a residential population and can't control what they bring on site). It's a change I would love to make, but I'm not ready to take that step yet. Here's a great resource for videos that include discussions just like your question. Theses are really REALLY smart people talking it out on both sides. Hope it helps make the decision! http://techfieldday.com/ https://vimeo.com/121317364 http://techfieldday.com/video/aruba-atmosphere-2016-wireless-clients-roundtable/ Robert Harris Manager of Network Services Culinary Institute of America 1946 Campus Drive Hyde Park, NY 845-451-1681 www.ciachef.edu Food is Life Create and Savor Yours.™ Please consider the environment before printing this e-mail. >>> Steve Bohrer <[email protected]> 3/15/2016 10:55 AM >>> Last April in http://listserv.educause.edu/scripts/wa.exe?A2=WIRELESS-LAN;57305dd0.1504 "802.11ac AP Deployment," several respondents say they use 40 MHz channel width campus wide. Some noted that the ac standard provides for dynamic switching back and forth to 20 MHz, so interference is less of an issue. But, those respondents didn't mention if they were using only the U-NII-1 and U-NII-3 bands, or if they are also using the bands that require DFS, U-NII-2 and/or -2e . Is there any consensus or best practice on this? Is anyone using -2 and -2e, or just staying with four non-overlapping 40 MHz 5 GHz channels? Are most current clients able to connect to the DFS channels? Aruba's "RF and Roaming Optimization for Aruba 802.11ac Networks" doc ( http://community.arubanetworks.com/t5/Validated-Reference-Design/RF-and-Roaming-Optimization-for-Aruba-802-11ac-Networks/ta-p/227716 ) says that: "Majority of voice specific devices do not scan many channels before roaming as they have active voice calls. For such devices, do not use U-NII-2 and U-NII-2e channels." and "Roaming test should be performed using different types of clients expected on the WLAN, to see their behavior on DFS channels." So, that sounds like a "no" vote on DFS, though we don't have wifi VoIP phones. Does any one have field experience and recommendations? Any guesses if DFS channels will ever be useable with a student BYO client base? Thanks, Steve Bohrer Network & Security Admin IT Infrastructure, Emerson College 617-824-8523 ********** 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/.
