Why users are not able to see certain printers even though they are in the Airgroup server table

Aruba Employee
Q:

Why users are not able to see only certain printers even though they are in the Airgroup server table ?



A:

In certain scenarios  we may notice  printers come up under the server /cache entries on the controller.

However when an airgroup user does search for printer, they may not see all the printers, certain printers may be not visible .

This is because the service IDs sent by the user in the MDNS query are not broadcast by these printers 


In the below capture the Ipad sends query for service id "_universal_sub_ipp_tcplocal" and "_universal_sub_ipps_tcplocal" and hence the controller will 
respond with the printers that broadcasts these service ids.

 


Non–Visible printer : 

_printer._tcp.local                                                              PTR                         IN     7200  10.125.30.223  5820.05  Wed Mar 18 13:24:26 2015
_pdl-datastream._tcp.local                                               PTR                         IN     7200  10.125.30.223  6112.25  Wed Mar 18 13:24:26 2015
_ipp._tcp.local                                                                     PTR                         IN     7200  10.125.30.223  5888.15  Wed Mar 18 13:24:26 2015
_http._tcp.local                                                                    PTR                         IN     7200  10.125.30.223  6293.88  Wed Mar 18 13:24:26 2015
NPIED487E.local                                                                  A                             IN     240   10.125.30.223  194.43   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._printer._tcp.local                     SRV/NBSTAT                  IN     240   10.125.30.223  209.87   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._printer._tcp.local                     TXT                         IN     240   10.125.30.223  205.14   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._printer._tcp.local                     TXT                         IN     240   10.125.30.223  197.18   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._printer._tcp.local                     TXT                         IN     240   10.125.30.223  196.42   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._printer._tcp.local                     TXT                         IN     240   10.125.30.223  208.15   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._pdl-datastream._tcp.local              SRV/NBSTAT                  IN     240   10.125.30.223  207.35   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._pdl-datastream._tcp.local              TXT                         IN     240   10.125.30.223  200.64   Wed Mar 18 13:24:26 2015
hp LaserJet 4250 [ED487E]._ipp._tcp.local                         SRV/NBSTAT                  IN     240   10.125.30.223  209.44   Wed Mar 18 13:24:26 2015

 

Visible-printer :

_printer._tcp.local                                                                         PTR         IN     4500  10.125.26.29   3745.82  Wed Mar 18 13:24:51 2015
_universal._sub._ipp._tcp.local                                                PTR         IN     4500  10.125.26.29   3694.14  Wed Mar 18 13:24:51 2015
_ipp._tcp.local                                                                                PTR         IN     4500  10.125.26.29   3628.81  Wed Mar 18 13:24:51 2015
_pdl-datastream._tcp.local                                                          PTR         IN     4500  10.125.26.29   3616.14  Wed Mar 18 13:24:51 2015
_http._tcp.local                                                                              PTR         IN     4500  10.125.26.29   3793.56  Wed Mar 18 13:24:51 2015
XRX9C934E25C52D.local                                                                A           IN     120   10.125.26.29   355.03   Wed Mar 18 13:24:51 2015
Xerox WorkCentre 3615 (25:C5:2D)._printer._tcp.local         SRV/NBSTAT  IN     120   10.125.26.29   130.45   Wed Mar 18 13:24:51 2015
Xerox WorkCentre 3615 (25:C5:2D)._printer._tcp.local         TXT         IN     4500  10.125.26.29   3670.33  Wed Mar 18 13:24:51 2015
Xerox WorkCentre 3615 (25:C5:2D)._ipp._tcp.local             SRV/NBSTAT  IN     120   10.125.26.29   389.55   Wed Mar 18 13:24:51 2015
Xerox WorkCentre 3615 (25:C5:2D)._ipp._tcp.local             TXT         IN     4500  10.125.26.29   3640.60  Wed Mar 18 13:24:51 2015
Xerox WorkCentre 3615 (25:C5:2D)._pdl-datastream._tcp.local  SRV/NBSTAT  IN     120   10.125.26.29   210.97   Wed Mar 18 13:24:51 2015
                

In order to learn other printers we may need to use specific app provided by printer vendor on the client or configure the printers to send these service IDs.
 

Version history
Revision #:
2 of 2
Last update:
‎07-30-2015 04:06 AM
Updated by:
 
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