LibreQoS/docs/v2.0/cake.md

CAKE

By default, LibreQoS uses Common Applications Kept Enhanced (CAKE) using the diffserv4 parameter.

DSCP

https://www.iana.org/assignments/dscp-registry/dscp-registry.xhtml

Traffic Classes and DSCP Tags for Diffserv4

• Latency Sensitive (CS7, CS6, EF, VA, CS5, CS4)
• Streaming Media (AF4x, AF3x, CS3, AF2x, TOS4, CS2, TOS1)
• Best Effort (CS0, AF1x, TOS2, and those not specified)
• Background Traffic (CS1)

List of known Diffserv codepoints:

• Least Effort (CS1)
• Best Effort (CS0)
• Max Reliability & LLT "Lo" (TOS1)
• Max Throughput (TOS2)
• Min Delay (TOS4)
• LLT "La" (TOS5)
• Assured Forwarding 1 (AF1x) - x3
• Assured Forwarding 2 (AF2x) - x3
• Assured Forwarding 3 (AF3x) - x3
• Assured Forwarding 4 (AF4x) - x3
• Precedence Class 2 (CS2)
• Precedence Class 3 (CS3)
• Precedence Class 4 (CS4)
• Precedence Class 5 (CS5)
• Precedence Class 6 (CS6)
• Precedence Class 7 (CS7)
• Voice Admit (VA)
• Expedited Forwarding (EF)

List of traffic classes in RFC 4594:

(roughly descending order of contended priority)

(roughly ascending order of uncontended throughput)

• Network Control (CS6,CS7) - routing traffic
• Telephony (EF,VA) - aka. VoIP streams
• Signalling (CS5) - VoIP setup
• Multimedia Conferencing (AF4x) - aka. video calls
• Realtime Interactive (CS4) - eg. games
• Multimedia Streaming (AF3x) - eg. YouTube, NetFlix, Twitch
• Broadcast Video (CS3)
• Low Latency Data (AF2x,TOS4) - eg. database
• Ops, Admin, Management (CS2,TOS1) - eg. ssh
• Standard Service (CS0 & unrecognised codepoints)
• High Throughput Data (AF1x,TOS2) - eg. web traffic
• Low Priority Data (CS1) - eg. BitTorrent