[IPP] Required real-time clock prevents System Service use by someprinters

[IPP] Required real-time clock prevents System Service use by someprinters

[IPP] Required real-time clock prevents System Service use by someprinters

wamwagner at comcast.net wamwagner at comcast.net
Sun Oct 2 16:20:03 UTC 2016


I am surprised to see the RTC (a term I have disliked since it means something else at the detailed hardware level) or NTP question come up again. This was an issue with the printer MIB 15 years ago, but since even the most minor device seems to have time keeping capabilities today, I did think it was an non-issue. Smith’s message suggests this may be wrong. But I suggest that any imaging system complex enough to concern itself with system functions will have timekeeping capability. Unless someone can come up with a real and valid example of a networked imaging device for which system service capability is appropriate that does not have timekeeping capability, I suggest that these time related attributes remain required.
Thanks,
Bill Wagner



From: Ira McDonald
Sent: Sunday, October 2, 2016 11:42 AM
To: ipp at pwg.org; Ira McDonald
Subject: [IPP] Required real-time clock prevents System Service use by someprinters

Hi,
The System Service requirement for a running tick counter and
for an actual RTC w/ meaningful time would prevent the use of any
Resource operations by some printers.  Also, the firmware update
and graceful restart abilities, which move away from traditional
vendor- and model-specific approaches and improve Managed
Print Service compatibility.
Questions:
(1) Should we reduce the various "date-time-at-xxx" attributes to 
RECOMMENDED?
-- Comment - they are REQUIRED in IPP Everywhere

(2) Should we allow the various "time-at-xxx" attributes to be
trivial implementations (i.e., without meaningful tick counter)?
-- Comment - they are REQUIRED in RFC2911/RFC2911bis,
with some ambiguity about implementation 

Note that I've personally been a proponent of required RTC
with meaningful date/time for years, so I'm conflicted about
bringing this subject up.
WDYT?
Cheers,
- 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
http://sites.google.com/site/blueroofmusic
http://sites.google.com/site/highnorthinc
mailto: blueroofmusic at gmail.com
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