Configuring Tricolor Marking Policers
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:
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 1 describes all the configurable TCM statements.
Table 1: 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 |
