[IPP] printer-alert in PWG 5100.9 & its relevance in IPP FaxOut and IPP Scan

[IPP] printer-alert in PWG 5100.9 & its relevance in IPP FaxOut and IPP Scan

[IPP] printer-alert in PWG 5100.9 & its relevance in IPP FaxOut and IPP Scan

Ira McDonald blueroofmusic at gmail.com
Wed May 14 14:28:49 UTC 2014


'configurationChange' has always been a one-time event - it was originally
from the prtGeneralConfigChanges counter in Printer MIB v1 and v2 (RFC 1759
RFC 3805).  It was defined as OPTIONAL event (not state) in IPP Events
and Subscriptions (RFC 3995), named 'printer-config-changed'.

Some confusion may arise because PWG 5100.9 defines new values for the IPP
attribute "job-state-reasons" - these are NOT states - they are durable
reasons that
"job-state" may have changed in the past.  They must not be simply "aged"
out of the
"job-state-reasons" attribute.  But, if they reflect a binary event (e.g.,
then they must be removed from "job-state-reasons" when the condition

I'll let Mike and Pete answer why it's listed as REQUIRED in IPP FaxOut and
IPP Scan.
That doesn't sound right to me, based on RFC 3995.

- Ira

Ira McDonald (Musician / Software Architect)
Co-Chair - TCG Trusted Mobility Solutions WG
Chair - Linux Foundation Open Printing WG
Secretary - IEEE-ISTO Printer Working Group
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music / High North Inc
mailto: blueroofmusic at gmail.com
Winter  579 Park Place  Saline, MI  48176  734-944-0094
Summer  PO Box 221  Grand Marais, MI 49839  906-494-2434

On Tue, May 13, 2014 at 10:18 PM, Soma Meiyappan <
Soma.Meiyappan at conexant.com> wrote:

> Hello,
> PWG 5100.9 allows an alert code(PrtAlertCodeTC) 'configurationChange' for
> printer-alert. This value sounds like it is defined to be an event rather
> than a state.
> If you think that it is a 'state' rather than an 'event', can you please
> explain how? If it should be treated as a 'state', then should devices
> initiate a self-determined-timeout value to come out of that 'state' (this
> sounds like a method to morph an event into a state)?
> If it is indeed an 'event', then please explain why this attribute
> (printer-alert) is part of the REQUIRED table in IPP FaxOut and IPP Scan
> specifications when the IPP operations for event subscription themselves
> are optional.
> Thanks and Regards,
> Somasundaram.
> _______________________________________________
> ipp mailing list
> ipp at pwg.org
> https://www.pwg.org/mailman/listinfo/ipp
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