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OVERVIEW
Administrators want the ability to effectively discover and manage printers offered by all major printer
vendors from a single software interface. Only having to install one software and learn a single
interface saves valuable time and money. The tool also has to provide adequate levels of support for
all vendors. Fortunately, HP Web Jetadmin is a premier printer management solution that can
effectively discover and manage non-HP printers. The level of support provided depends on the ability
of the device to adhere to a set of industry standards.
DISCOVERING DEVICES
During discovery of devices, HP Web Jetadmin uses SNMP queries to gather information from the
device. If HP Web Jetadmin concludes that the device is a peripheral such as a printer, plotter, or
multifunction device, it will display it in the list of discovered devices. In order for HP Web Jetadmin to
conclude that a device is a peripheral, the device must be able to answer a set of industry-standard
questions.
A Management Information Base (MIB) is a set of objects that defines the types of SNMP queries that
can be asked of a device. For example, the Standard Printer MIB (RFC 1759) is a generic set of
objects to which most peripherals should be able to provide answers when queried. The Standard
Printer MIB consists of objects that describe functionality and capabilities of the printer such as page
counts or media types. Other common MIBs include MIB2 (RFC 1213) and the Host Resources MIB
(RFC 1514). Device vendors also have a set of proprietary MIBs that contain information unique to
their devices. HP Web Jetadmin must have knowledge of MIB objects in device plug-ins before it can
send queries to devices using those MIB objects.
Devices must be able to answer queries defined in the common industry-standard MIBs in order for
HP Web Jetadmin to discover the devices. Otherwise, there is not enough information pertaining to
the device to warrant displaying it in the list of discovered devices. HP Web Jetadmin focuses on
printer management, and it would be increasingly difficult to distinguish devices as printers unless
they can answer a standard set
of questions such as those
defined in the Standard Printer
MIB.
Once a device is discovered in
HP Web Jetadmin, the level of
support that can be provided will
depend on the depth of queries
defined in the respective device
plug-ins.
DEVICE PLUG-INS
Device plug-ins in HP Web
Jetadmin contain SNMP queries
to support functionality for a
device. The more definitions that
exist in the plug-in that are
unique to that device, the higher
the level of support that is
provided.
HP Web Jetadmin has no specific
knowledge of proprietary objects Figure 1—Third-party device support
2
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