Configure a WLAN for Voice with the 8821 on Catalyst 9800 WLC

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214863-voice-deployment-on-catalyst-9800-wirele.html

Published

2024-09-24

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Cisco TechNote 214863 disables band select and load balancing on the 8821 voice WLAN. disputed in context
• Cisco TechNote 214863 sets 12 Mbps mandatory, 18 Mbps and above supported, and all rates below 12 Mbps disabled on both 2.4 GHz and 5 GHz for 8821 voice. in context
• For 802.1X WLANs carrying 8821 voice on a Catalyst 9800, Cisco TechNote 214863 recommends FT+802.1X as the AKM with Fast Transition enabled and Over the DS disabled. in context
• Cisco TechNote 214863 enables load-based call admission control on both 2.4 GHz and 5 GHz radios for 8821 voice on the Catalyst 9800. in context
• Cisco TechNote 214863 notes that SIP CAC is not supported on the Catalyst 9800 after IOS XE 17.3.1. in context
• Cisco TechNote 214863 enables off-channel scan defer for priorities 5, 6 and 7 so the AP does not go off-channel shortly after voice frames. in context
• Cisco TechNote 214863 says Fast Transition is not required on PSK voice WLANs because the PSK roaming handshake is already short. in context
• Cisco TechNote 214863 applies auto-QoS voice, the platinum and platinum-up service policies, and the optimized-voice EDCA profile on both bands. in context

Cite this source record

APA

WarmTransfer. (2024, September 24). Configure a WLAN for Voice with the 8821 on Catalyst 9800 WLC. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-214863-9800-voice-8821

BibTeX

@misc{warmtransfer-cisco-technote-214863-9800-voice-8821,
  title  = {Configure a WLAN for Voice with the 8821 on Catalyst 9800 WLC},
  author = {{WarmTransfer}},
  year   = {2024},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-214863-9800-voice-8821},
  note   = {Cisco Systems, accessed 2026-09-25}
}