docsIfCmtsChannelUtUtilization

The calculated and truncated utilization index for this
physical upstream or downstream channel, accurate as of
the most recent docsIfCmtsChannelUtilizationInterval.
              
Upstream Channel Utilization Index:
              
The upstream channel utilization index is expressed as a
percentage of mini-slots utilized on the physical channel,
regardless of burst type.  For an Initial Maintenance
region, the mini-slots for the complete region are
considered utilized if the CMTS received an upstream
burst within the region from any CM on the physical
channel.  For contention REQ and REQ/DATA regions, the
mini-slots for a transmission opportunity within the
region are considered utilized if the CMTS received an
upstream burst within the opportunity from any CM on the
physical channel.  For all other regions, utilized
mini-slots are those in which the CMTS granted
bandwidth to any unicast SID on the physical channel.
              
For an upstream interface that has multiple logical
upstream channels enabled, the utilization index is a
weighted sum of utilization indices for the logical
channels.  The weight for each utilization index is the
percentage of upstream mini-slots allocated for the
corresponding logical channel.
Example:
If 75% of bandwidth is allocated to the first logical
channel and 25% to the second, and the utilization
indices for each are 60 and 40, respectively, the
              
utilization index for the upstream physical channel is
(60 * 0.75) + (40 * 0.25) = 55.  This figure
applies to the most recent utilization interval.
              
Downstream Channel Utilization Index:
              
The downstream channel utilization index is a percentage
expressing the ratio between bytes used to transmit data
versus the total number of bytes transmitted in the raw
bandwidth of the MPEG channel.  As with the upstream
utilization index, the calculated value represents
the most recent utilization interval.
Formula:
Downstream utilization index =
(100 * (data bytes / raw bytes))
              
Definitions:
Data bytes:    Number of bytes transmitted as data in the
               docsIfCmtsChannelUtilizationInterval.
               Identical to docsIfCmtsDownChannelCtrUsed
               Bytes measured over the utilization
               interval.
Raw bandwidth: Total number of bytes available for
               transmitting data, not including bytes
               used for headers and other overhead.
Raw bytes:     (raw bandwidth *
               docsIfCmtsChannelUtilizationInterval).
               Identical to docsIfCmtsDownChannelCtrTotal
               Bytes measured over the utilization
               interval.

MIB

DOCS-IF-MIB

OID

.1.3.6.1.2.1.10.127.1.3.9.1.3

Type

column

Access

readonly

Status

current

Units

percent

Parent

docsIfCmtsChannelUtilizationEntry

Table

docsIfCmtsChannelUtilizationTable

Siblings

2