Each cbpAcctEntry provides statistics for traffic of interest
on an ingress and/or egress interfaces. The traffic of interest
may be used for purposes like billing, and is referred to from
here on in the MIB by the term 'traffic-type', which corresponds
to cbpAcctTrafficIndex. Traffic-types are configured by the user
on a per interface basis.
The statistics include ingress packet counts, ingress octet
counts, egress packet counts and egress octet counts. Entries
are created when traffic-type is configured on an interface.
Entries are deleted automatically when the user
removes the corresponding traffic-type configuration from an
interface.