Table 109: Default Mapping Of Dscp Values To Internal Phb/Drop Values; Qos Map Dscp-Mutation - Edge-Core ECS4210-12P Reference Manual

12/28-port gigabit ethernet layer 2 switch

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| Class of Service Commands

Priority Commands (Layer 3 and 4)

dscp-mutation

This command maps DSCP values in incoming packets to per-hop behavior and

drop precedence values for priority processing. Use the no form to restore the

default settings.

qos map dscp-mutation phb drop-precedence from dscp0 ... dscp7

no qos map dscp-mutation dscp0 ... dscp7

phb - Per-hop behavior, or the priority used for this router hop. (Range: 0-7)

drop-precedence - Drop precedence used in controlling traffic congestion.

(Range: 0 - Green, 3 - Yellow, 1 - Red)

dscp - DSCP value in ingress packets. (Range: 0-63)

Table 109: Default Mapping of DSCP Values to Internal PHB/Drop Values

The ingress DSCP is composed of ingress-dscp10 (most significant digit in the left column) and

ingress-dscp1 (least significant digit in the top row (in other words, ingress-dscp = ingress-dscp10

* 10 + ingress-dscp1); and the corresponding internal-dscp is shown at the intersecting cell in the

The ingress DSCP is bitwise ANDed with the binary value 11 to determine the drop precedence. If

the resulting value is 10 binary, then the drop precedence is set to 0.

Command Mode

Interface Configuration (Port, Static Aggregation)

Command Usage

Enter a value pair for the internal per-hop behavior and drop precedence,

followed by the keyword "from" and then up to eight DSCP values separated by

This map is only used when the QoS mapping mode is set to "DSCP" by the

map trust-mode

command, and the ingress packet type is IPv4.

Two QoS domains can have different DSCP definitions, so the DSCP-to-PHB/

Drop Precedence mutation map can be used to modify one set of DSCP values

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