1. Best Practices for Voice Deployment with Cisco WLAN Infrastructure
  2. Infrastructure and Vendor Model Recommendations
  3. General WLAN Recommendations
  4. WLAN Infrastructure Recommendations for Voice Support
  • Best Practices for Voice Deployment with Cisco WLAN Infrastructure
WLAN Infrastructure Recommendations for Voice Support

WLAN Infrastructure Recommendations for Voice Support

WLAN Infrastructure Recommendations for Voice Support
Setting
Value
Infra type
Controller based
Security
WPA2 or WPA3
Voice WLAN
5 GHz only
Encryption
AES
Note: Do not use Wired Equivalent Privacy (WEP) or Temporal Key Integrity Protocol (TKIP).
Authentication: Server Based (Radius)
802.1X EAP-TLS/PEAP-MSCHAPv2
Authentication: Pre-Shared Key (PSK) Based
Enable both PSK and FT-PSK.
Note: Device automatically selects FT-PSK. PSK is necessary to support legacy/non-11r devices on same SSID.
Operational Data Rates
2.4 GHz:
  • G: 12, 18, 24, 36, 48, 54 (disable all lower rates, including 11b-legacy)
  • N: MCS 0 -15
5 GHz:
  • A:12, 18, 24, 36, 48, 54 (disable all lower rates)
  • AN: MCS 0 - 15
  • AC: MCS 0 - 7, 8
  • AX: MCS 0 - 7, 8, 9, 10, 11
Note: Adjust rate settings according to environmental characteristics. See Recommended Environment to accomplish balanced AP minimum coverage.
Fast Roam Methods
If supported by infrastructure in priority order:
  • FT (802.11R)
  • CCKM
  • OKC or PMK Cache. Do not enable both.
DTIM Interval
1
Beacon Interval
100
Channel Width
2.4 GHz: 20 MHz
5 GHz: 20 MHz
WMM
Enable
802.11k
Enable only Neighbor Report. Do not enable any 11k measurements.
802.11w
Enable as optional (not mandatory)
802.11v
Enable
AMPDU
Enable
Note: Local environmental/RF situations (such as high interference level, collisions, obstructions) may yield local high retries ratio, delays, and packet-drops. The AMPDU feature can degrade voice performance in addition to the challenging RF. In such cases, it is recommended to disable the AMPDU.