PMP> Comments on Printer Port Monitor MIB 1.0 working draft dated March 21, 2005

PMP> Comments on Printer Port Monitor MIB 1.0 working draft dated March 21, 2005

Bergman, Ron Ron.Bergman at rpsa.ricoh.com
Thu Mar 24 15:03:22 EST 2005


Ira,

Regarding your comment:

2. ppmPortHrDeviceIndex - This seems to imply an hrDeviceTable entry is
needed for each port on the system. Is this the expected behavior? 
Or is this just the hrDeviceIndex of the printer? 
Or is the the hrDeviceIndex for the network card?

<ira>  For the Microsoft tool (TCPMon), EACH port (channel) has to
have a separate 'hrDeviceIndex' - this is different than typical
Printer MIB implementations, but it's a Microsoft tool limitation.
Note that Microsoft TCPMon _only_ supports LPR and Raw ports (no
other protocol is supported or contemplated according to co-editor
Mike Fenelon from the Microsoft Longhorn printing team), so this
only means two 'hrDeviceIndex' values at most (for each printer).
</ira>

I do not recall ever hearing this.  It certainly is not clear from
the MIB text (see below) that this is the case.  If this is true
then it is not really hrDeviceIndex that is indicated but is just
ppmPortIndex.

Also, for the printers I work with there will be a minimum of 10
ports reported.  If IPP is enable, there will be a minimum of 15.
The maximum number will be 192.

	Ron

>From the MIB:
ppmPortHrDeviceIndex OBJECT-TYPE
    SYNTAX      Integer32 (0..2147483647)
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
"The value of 'hrDeviceIndex' in the IETF Host Resources MIB 
(RFC 1514/2790), to be used for status queries for this port if 
the value of 'ppmPortSnmpStatusQueryEnabled' is 'true'.

If this object is zero, then monitoring applications MUST NOT 
attempt status queries for this port in the IETF Host Resources 
MIB (RFC 1514/2790) and/or IETF Printer MIB (RFC 1759/3805)."
    REFERENCE
"hrDeviceStatus, hrPrinterStatus, hrPrinterDetectedErrorState i
n IETF Host Resources MIB (RFC 1514/2790).
prtChannelStatus in IETF Printer MIB (RFC 1759/3805)."
    DEFVAL      { 0 }                   -- no host device index
    ::= { ppmPortEntry 7 }





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