Each entry defines a set of configurable thresholds
and parameters for each monitoring traffic type for a
downstream.
A set of thresholds applied by cable admission control
in the process of monitoring downstream bandwidth.
The following classes of downstream policy can be
configured:
1. Global
An entry with a ccacDsConfigRevIfIndex of '0' identifies
a global policy.
2. Per Downstream Channel
An entry with a ccacDsConfigRevIfIndex with an ifType of
'docsCableDownstream' identifies a downstream channel
policy.
Downstream level thresholds supersedes global level
thresholds.