Cisco 8861 Deployment Manual page 55

If using best effort applications frequently or if DSCP values for priority applications (e.g. voice, video, call control) are not
preserved to the access point, then is recommended to enable the lower priority queues (0-3) along with the higher priority
queues (4-6) to defer off channel scanning as well as potentially increasing the scan defer time.
For deployments where EAP failures occur frequently, it is recommended to enable priority queue 7 to defer off channel
scanning during EAP exchanges.
DHCP Address Assignment Required should be disabled.
Management Frame Protection should be set to Optional or Disabled.
Use a DTIM Period of 2 with a beacon period of 100 ms.
Ensure Client Load Balancing and Client Band Select are disabled.
Media Session Snooping can be enabled to utilize SIP CAC.
It is recommended to set Re-anchor Roamed Voice Clients to disabled as this can cause brief interruptions with wireless LAN
connectivity when a call is terminated after performing an inter-controller roaming.
Cisco IP Phone 8861 and 8865 Wireless LAN Deployment Guide
55