DSCP TOS CoS Precedence Conversion Chart

In networking, DSCP, TOS, CoS, and Precedence are terms related to Quality of Service (QoS) which is used to prioritize certain types of traffic to ensure the performance of critical applications over a network.

Here’s a bit more detail on how they work:

In summary, these terms are all about prioritizing traffic to ensure that the most important data gets through the network efficiently, even when the network is congested. They are essential for networks that carry a mix of voice, video, and data traffic, where some types of traffic need to be prioritized over others to maintain quality.

DSCP ClassDSCP (bin)DSCP (hex)DSCP (dec)ToS (dec)ToS (hex)ToS (bin)ToS Prec. (bin)ToS Prec. (dec)ToS Delay FlagToS Throghput FlagToS Reliability FlagTOS String Format
cs10010000×088320×20001000000011000Priority
af110010100×0A10400×28001010000011010Priority
af120011000×0C12480×30001100000011100Priority
af130011100×0E14560×38001110000011110Priority
cs20100000×1016640×40010000000102000Immediate
af210100100×1218720×48010010000102010Immediate
af220101000×1420800×50010100000102100Immediate
af230101100×1622880×58010110000102110Immediate
cs30110000×1824960×60011000000113000Flash
af310110100×1A261040×68011010000113010Flash
af320111000×1C281120×70011100000113100Flash
af330111100×1E301200×78011110000113110Flash
cs41000000×20321280×80100000001004000FlashOverride
af411000100×22341360×88100010001004010FlashOverride
af421001000×34361440×90100100001004100FlashOverride
af431001100×26381520×98100110001004110FlashOverride
cs51010000×28401600xA0101000001015000Critical
ef1011100×2E461840xB8101110001015110Critical
cs61100000×30481920xC0110000001106000Internetworkcontrol
cs71110000×38562240xE0111000001117000Networkcontrol

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