Exclude overhead bytes from CoS queue statistics

By default, the Layer 2 header bytes applied to upper-level logical interfaces are included in CoS per-queue statistics at the physical interface, which can provide inaccurate results. You can exclude the counting of overhead bytes from aggregate queue statistics by enabling exclude-queue-overhead-bytes option at the [edit class-of-service interfaces interface-name] hierarchy level. To also exclude the counting of overhead bytes from aggregate queue statistics of all child interfaces, including logical interfaces and interface sets, add the include-hierarchy option at the [edit class-of-service interfaces interface-name exclude-queue-overhead-bytes] hierarchy level.