Source note · QoS marking and queuing for voice
DSCP values of the form xxx000 are reserved as Class Selector codepoints for backward compatibility with IP Precedence.
Checked 2026-09-24
- Vendor
- IETF
- Product
- Differentiated Services
- Subsystem
- Class Selector codepoints
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- RFC 2474: Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers — IETF / RFC Editor · tier 1 standards and regulators · Section 4.2.2.1
Cite this note
APA
WarmTransfer. (2026, September 24). QoS marking and queuing for voice: source note qos-marking-class-selector-compat. WarmTransfer. https://warmtransfer.net/knowledge/claims/qos-marking-class-selector-compat
BibTeX
@misc{warmtransfer-claim-qos-marking-class-selector-compat,
title = {QoS marking and queuing for voice: source note qos-marking-class-selector-compat},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/qos-marking-class-selector-compat},
note = {Source note qos-marking-class-selector-compat, checked 2026-09-24}
}