Cisco's Windows DSCP tech note has administrators create a DWORD named Do not use NLA with value 1 under HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\QoS and reboot before configuring Policy-based QoS.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Windows
- Subsystem
- Policy-based QoS
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Enable DSCP QoS Tagging on Windows Machines — Cisco · tier 2 current vendor documentation · Configure, Step 1 (registry)
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting voice QoS markings that are stripped or ignored: source note voice-qos-troubleshooting-win-do-not-use-nla. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-qos-troubleshooting-win-do-not-use-nla
BibTeX
@misc{warmtransfer-claim-voice-qos-troubleshooting-win-do-not-use-nla,
title = {Troubleshooting voice QoS markings that are stripped or ignored: source note voice-qos-troubleshooting-win-do-not-use-nla},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-qos-troubleshooting-win-do-not-use-nla},
note = {Source note voice-qos-troubleshooting-win-do-not-use-nla, checked 2026-10-02}
}