Bob stated...
>The concern I have about SNMP is that a client's "get status" query co=
uld >be
behind several GetBulk requests and thus not get processed fast enough =
>for the
client to determine that the printer is alive but very busy.
This is one reason notifications are useful rather than polling.
Harry Lewis - IBM Printing Systems
owner-sdp@pwg.org on 05/14/98 01:43:48 PM
Please respond to owner-sdp@pwg.org
To: robert.herriot@Eng.Sun.COM, jkm@underscore.com
cc: sdp@pwg.org
Subject: Re: SDP> Suggestions for discussion at SDP session next week
In my solution, I assume that there is a port dedicated to returning pr=
inter
status only and it has higher priority for processing than the normal I=
PP
port or the SNMP port. I want to keep the probability of a reply near =
100%
even when the printer is very busy with other network requests.
The concern I have about SNMP is that a client's "get status" query cou=
ld be
behind
several GetBulk requests and thus not get processed fast enough for the=
client
to
determine that the printer is alive but very busy.
Can an SNMP request have as good a guarantee of a quick response as a
dedicated port?
Also in my proposal, I assume that the data returned is in an IPP compa=
tible
format.
Bob Herriot
At 08:15 PM 5/13/98 , Jay Martin wrote:
>Regarding solution "b":
>
>> b) the primary issue is being able to determine the printer stat=
us, i.e.
>> did the connection fail because the printer is down or just =
busy.
One
>> simple solution is to have a printer read on a UDP port dedi=
cated to
>> returning a status summary whenever it receives a request on=
the
port. If
>> the incoming bytes are limited and have simple options, the =
printer
will
>> never be tied up for long on each transaction and will alway=
s be
able to let
>> a client know if it is alive and whether there are any probl=
ems.
Then if the
>> connection fails, it is because the printer is down or the I=
P
address is bad.
>
>Sounds like a fixed SNMP query. Why don't we just use
>SNMP and the Printer MIB for this kind of thing?
>
> ...jay
>
>----------------------------------------------------------------------=
>-- JK Martin | Email: jkm@underscore.com --=
>-- Underscore, Inc. | Voice: (603) 889-7000 --=
>-- 41C Sagamore Park Road | Fax: (603) 889-2699 --=
>-- Hudson, NH 03051-4915 | Web: http://www.underscore.com --=
>----------------------------------------------------------------------=
>
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