HP Web Jetadmin Software Instrukcja Użytkownika Strona 179

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Details About Running a WS-Discovery
If you choose the WS-Discovery method while creating templates (see Create Discovery Templates
on page 166), editing templates (see Edit Discovery Templates on page 168), or scheduling discoveries (see
Schedule Discoveries on page 163), then the Choose WS-Discovery settings page is displayed. On this page,
select the number of routers to cross (or hops) for the discovery. Increasing the number of hops might increase
the amount of time for the discovery to complete. In addition, the discovery generates more network trac than
a discovery with fewer routers to cross.
Managing Third-Party Printers in HP Web Jetadmin
During device discoveries, 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
displays the device in the list of discovered devices. 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 denes 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 and 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 dened in the common industry-standard MIBs for HP Web Jetadmin to
discover the devices. Otherwise, there is not enough information about the device to warrant displaying it in the
list of discovered devices. HP Web Jetadmin focuses on printer management, and it would be increasingly
dicult to distinguish devices as printers unless they can answer a standard set of questions such as those
dened in the Standard Printer MIB.
After HP Web Jetadmin discovers a device, the level of support that can be provided depends on the depth of
queries dened in the respective device plug-ins.
Support
Support in HP Web Jetadmin can be quite extensive if the device can answer industry-standard queries. Quite a
bit of HP Web Jetadmin functionality can be supported through standard queries such as basic status,
conguration, alerts, reporting, and page counting. HP Web Jetadmin attempts to support the following
functionality for third-party devices using standard queries for basic support.
Device Page — Status Tab
Device and Information categories
Picture of a generic device, possibly vendor specic
Device Model, IP Hostname, IP Address, System Contact
Status category
Basic status (online/oine, toner low, toner out, media low, media out, paper jam, cover open, service
requested)
Front panel display
Supply levels category
ENWW Discovery 153
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