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Policer Color-Marking and Actions
Table 1 lists each
of the Junos OS policer types supported. For each policer type,
the table summarizes the color-marking criteria used to categorize
a traffic flow and, for each color, the actions taken on packets in
that type of traffic flow.
Table 1: Implicit and Configurable Policer Actions Based on Color Marking
Policer
Rate Limits and Color Marking | Implicit Action | Configurable Actions |
|---|
Single-Rate Two-Color Policer- Bandwidth limit
- Burst size
|
| Green
Conforms to
rate and burst size limits | Set PLP to low | – |
Red
Exceeds rate
and burst size limits | – | - Discard the packet.
- Assign to a forwarding class.
- Set PLP to low or high.
On some platforms, you can also set the PLP to medium-low or medium-high.
|
Single-Rate
Three-Color Policer- Committed information rate (CIR)
- Committed burst size (CBS)
- Excess burst size (EBS)
|
| Green
Conforms to
the CIR and CBS | Set PLP to low | – |
Yellow
Exceeds the
CIR and CBS but
conforms to the EBS | Set PLP to medium-high | – |
Red
Exceeds the EBS | Set PLP to high | |
Two-Rate Three-Color
Policer- Committed information rate (CIR)
- Committed burst size (CBS)
- Peak information rate (PIR)
- Peak burst size (PBS)
|
| Green
Conforms to
the CIR and CBS | Set PLP to low | – |
Yellow
Exceeds the
CIR and CBS, but
conforms to the PIR | Set PLP to medium-high | – |
Red
Exceeds the PIR
and PBS | Set PLP to high | |
| Hierarchical
Policer |
Aggregate
policer - Bandwidth limit
- Burst size
|
| Green
Conforms to
rate limits | Set PLP to low | – |
Red
Exceeds rate
limits | – | - Discard the packet.
- Assign to a forwarding class.
- Set PLP to low or high.
On some platforms, you can also set the PLP to medium-low or medium-high.
|
Premium policer - Bandwidth limit
- Burst size
|
| Green
Conforms to
rate limits | Set PLP to low | – |
Red
Exceeds rate
limits | – | |
Published: 2013-02-11
