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Configuring a Tricolor Marking Policer

A tricolor marking policer polices traffic on the basis of metering rates, including the CIR, the PIR, their associated burst sizes, and any policing actions configured for the traffic. To configure a tricolor marking policer, include the following statements at the [edit firewall] hierarchy level:



[edit firewall]
three-color-policer name {



action {
loss-priority high then discard;
}



logical-interface-policer;


single-rate {
(color-aware | color-blind);
committed-information-rate bps;
committed-burst-size bytes;
excess-burst-size bytes;
}




two-rate {
(color-aware | color-blind);
committed-information-rate bps;
committed-burst-size bytes;
peak-information-rate bps;
peak-burst-size bytes;
}


}

You can configure a tricolor policer to discard high loss priority traffic on a logical interface in the ingress or egress direction. To configure a policer on a logical interface using tricolor marking policing to discard high loss priority traffic, include the logical-interface-policer statement and action statement.

In all cases, the range of allowable bits-per-second or byte values is 1500 to 100,000,000,000. You can specify the values for bps and bytes either as complete decimal numbers or as decimal numbers followed by the abbreviation k (1000), m (1,000,000), or g (1,000,000,000).

The color-aware policer implicitly marks packets into four loss priority categories:

Low
Medium-low
Medium-high
High

The color-blind policer implicitly marks packets into three loss priority categories:

Low
Medium-high
High

Table 46 describes all the configurable TCM statements.

Table 46: Tricolor Marking Policer Statements

Statement	Meaning	Configurable Values
single-rate	Marking is based on the CIR, CBS, and EBS.	–
two-rate	Marking is based on the CIR, PIR, and rated burst sizes.	– – –
color-aware	Metering depends on the packet’s preclassification. Metering can increase a packet’s assigned PLP, but cannot decrease it.
color-blind	All packets are evaluated by the CIR or CBS. If a packet exceeds the CIR or CBS, it is evaluated by the PIR or EBS.
committed-information-rate	Guaranteed bandwidth under normal line conditions and the average rate up to which packets are marked green.	1500 through 100,000,000,000 bps
committed-burst-size	Maximum number of bytes allowed for incoming packets to burst above the CIR, but still be marked green.	1500 through 100,000,000,000 bytes
excess-burst-size	Maximum number of bytes allowed for incoming packets to burst above the CIR, but still be marked yellow.	1500 through 100,000,000,000 bytes
peak-information-rate	Maximum achievable rate. Packets that exceed the CIR but are below the PIR are marked yellow. Packets that exceed the PIR are marked red.	1500 through 100,000,000,000 bps
peak-burst-size	Maximum number of bytes allowed for incoming packets to burst above the PIR, but still be marked yellow.	1500 through 100,000,000,000 bytes

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