In color-aware mode, the metering treatment the
packet receives depends on its classification. Metering can increase
a packet’s preassigned PLP, but cannot decrease it, as shown
in Table 43.
Table 43: Color-Aware
Mode TCM PLP Mapping
Incoming PLP
Packet Metered Against
Possible Cases
Outgoing PLP
low
CBS and EBS
Packet does not exceed the CBS.
low
Packet exceeds the CBS but not the EBS.
medium-high
Packet exceeds the EBS.
high
medium-low
EBS only
Packet does not exceed the CBS.
medium-low
Packet does not exceed the EBS.
medium-low
Packet exceeds the EBS.
high
medium-high
EBS only
Packet does not exceed the CBS.
medium-high
Packet does not exceed the EBS.
medium-high
Packet exceeds the EBS.
high
high
Not metered by the policer.
All cases.
high
The following sections describe single-rate color-aware
PLP mapping in more detail.
