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Understanding Color-Blind Mode for Single-Rate Tricolor Marking

With the color-blind mode of single-rate tricolor marking, all packets are evaluated against the CBS. If a packet exceeds the CBS, it is evaluated against the EBS. In color-blind mode, the policer supports three loss priorities only: low, medium-high, and high.

Packets that exceed the CBS but are below the EBS are marked yellow (medium-high). Packets that exceed the EBS are marked red (high), as shown in Table 1.

Table 1: Color-Blind Mode TCM Color-to-PLP Mapping

Color

PLP

Meaning

Green

low

Conforming.

Yellow

medium-high

Packet exceeds the CIR and CBS but does not exceed the EBS.

Red

high

Packet exceeds the EBS.