Packets belonging to the green class have already
been marked by a classifier with low PLP. The marking policer can
leave the packet’s PLP unchanged or increase the PLP to medium-high
or high. Therefore, these packets are metered against both the CIR
and the PIR.
For example, if a BA or MF classifier marks a packet
with low PLP according to the ToS bits in the IP header, and the two-rate
TCM policer is in color-aware mode, the output loss priority is as
follows:
If the rate of traffic flow is less than the CIR, packets
remain marked as low PLP.
If the rate of traffic flow is greater than the CIR but
less than the PIR, some of the packets are marked as medium-high PLP,
and some of the packets remain marked as low PLP.
If the rate of traffic flow is greater than the PIR, some
of the packets are marked as high PLP, and some of the packets remain
marked as low PLP.
