Default beacon/dtim settings

What are folks thoughts regarding increasing the beacon interval as well as the dtim interval on a very large byod data ssid? I know the dtim increases for voice but I'm interested in upping those settings on regular data ssid.
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If you can sniff the traffic you may want to look at the "QBSS" to see change utilization.  Also you can check the beacon to make sure they are getting spit out even 102.4ms.  The AP has to content to send it out, so if it the medium is busy you'll see delayed beacons.  Though after so many delayed beacons will give itself better chances to access the medium (I forget the details)
Disable load balancing and band select. those are hacks.
In CPI you can run channel utilization reports. This will help you see airtime use
In 7.2 they added a way to limit users per radio.  I'd set the 2.4GHz fairly low.  This will help move dual band client over to 5GHz.  It does run the risk of 2.4GHz users not getting access. In 7.4 you can enable AVC and watch traffic patterns.  Give proiaty to the important class stuff and BE the unimportant stuff like facebook etc.
You may want to set up two SSIDs, a fast and a slow.  Make the fast SSID 5GHz only.  Users that can see it join it instead of getting on the 2.4 radios.  Also I'd make the 5GHz 40MHz, this will allow clients that support it use less airtime.  Make sure you select your 5GHz channels to match a large % of what you clients support.  If only 10% of your clients support unii-2 extended... well don't enable those channels.
CCNP - Wireless
CWNA and CWAP

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