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 CBS
and the EBS.
For example, if a BA or MF classifier marks a packet
with low PLP according to the type-of-service (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 CBS, packets
remain marked as low PLP.
If the rate of traffic flow is greater than the CBS but
less than the EBS, 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 EBS, some
of the packets are marked as high PLP, and some of the packets remain
marked as low PLP.
