I suggest that the best guidance that the Port Mon MIB can
give to users about status rollup (including from subunits
like Channels) is in Section 188.8.131.52 "Overall Printer Status"
and Appendix E (see below) of Printer MIB v2 (RFC 3805) and in
the accompanying Top 25 matrix.
Caution - it took four years to reach reasonable concensus
on the Top 25 matrix - this is _not_ a good topic to address
separately for Port Mon MIB.
Ira McDonald (Musician / Software Architect)
Blue Roof Music / High North Inc
PO Box 221 Grand Marais, MI 49839
Appendix E - Overall Printer Status Table
The Status Table establishes a convention for the top 25 printer
errors. The table defines a suggested relationship between various
printer states and the variables Printer hrDeviceStatus,
hrPrinterStatus, hrPrinterDetectedErrorState, prtAlertGroup,
prtAlertCode and various sub-unit status variables (prtInputStatus,
prtOutputStatus, prtMarkerStatus, prtMediaPathStatus and
prtChannelStatus). This table is the recommended implementation of
these variables. It is provided to guide implementors of this MIB
and users of the MIB by providing a sample set of states and the
variable values that are expected to be produced as result of that
state. This information supplements that provided in Section
184.108.40.206 "Overall Printer Status". This is not an exhaustive list
rather it is a guideline.
The definition of PrtSubUnitStatusTC specifies that SubUnitStatus is
an integer that is the sum of 5 distinct values/states: Availability,
Critical, Non-Critical, On-line and Transitioning. Thus when a non-
critical alert or alerts are present the values for Availability,
On-Line and Transitioning will be summed with the Non- Critical
Alerts (8) value.
The table was generated in landscape format and is located at
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