HP Web Jetadmin - Device Information Polling and Related Features

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DEVICE INFORMATION POLLING AND

RELATED FEATURES

in HP Web Jetadmin

CONTENTS

What is HP Web Jetadmin polling? ............................................................................................ 2



Database info vs. device info ..................................................................................................... 2

Protocol—how the query takes place .......................................................................................... 2

WJA feature/action vs. device detail .......................................................................................... 3

Polling types ............................................................................................................................ 3

Poll rate settings ....................................................................................................................... 3

Background polling .................................................................................................................. 3

Device list polling ..................................................................................................................... 4

Device tabs polling ................................................................................................................... 5

Alerts polling ........................................................................................................................... 5

Supplies alerts polling ............................................................................................................... 5

Supplies polling ....................................................................................................................... 6

Device list refresh ..................................................................................................................... 6

Refresh Selection ................................................................................................................... 6

Refresh Selection (Full) ........................................................................................................... 6

Features and device detail ......................................................................................................... 7

Alerts ................................................................................................................................... 7

Reports ................................................................................................................................ 7

Device detail—information flow ................................................................................................. 8

Helpful details .......................................................................................................................... 8

Network traffic ......................................................................................................................... 9

Summary of content (9 pages)

PAGE 1
DEVICE INFORMATION POLLING AND RELATED FEATURES in HP Web Jetadmin CONTENTS What is HP Web Jetadmin polling? ............................................................................................2 Database info vs. device info .....................................................................................................2 Protocol—how the query takes place ..........................................................................................2 WJA feature/action vs. device detail ...........
PAGE 2
WHAT IS HP WEB JETADMIN POLLING? HP Web Jetadmin uses a registration mechanism to add both device identities and device data into a background process called polling. HP Web Jetadmin is able to then query the details from devices on the network by using an efficient centralized polling mechanism. Devices and their associated data move in and out of polling registers for a variety of reasons. Here is an example: HP Web Jetadmin has been set up with Automatic Groups.
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appearing in device data can indicate that credentials are needed. Use the Credentials required column to determine if HP Web Jetadmin lacks a needed credential. Read the “Security and HP Web Jetadmin” white paper (found at the Self Help and Documentation tab at www.hp.com/go/wja) for more information about device credentials and mechanisms such as the HP Web Jetadmin Credentials Store. WJA FEATURE/ACTION VS.
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• Device registration is based on the All Devices list. • Background polling sends polls to a very specific set of default objects. • Data objects are added as other features come into play: • • • • Automatic grouping Client filtering Filtered lists Client lists, device columns enabled In a default installation of HP Web Jetadmin that includes devices in All Devices, background polling has the device/data registration as shown in Figure 2.
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DEVICE TABS POLLING Device tabs polling is invoked when a user has either the Troubleshoot or Status tab features enabled with devices selected (Figure 5). Again, the polling works independently from other polling and has its own settings under Tools > Options (see Figure 1 on page 3 above). ALERTS POLLING Alerts polling is closely related to alerts processing and activated alerts subscriptions.
PAGE 6
A few more important points about supplies polling: • Supplies levels for devices configured in supplies alerts subscriptions are checked anytime an SNMP trap is sent from the device (generally this is frequent when the device is established in one of the general alerts). • Supplies levels are also tested whenever a 24-hour poll is generated by general alerts. • Supplies alerts polling rates are non-adjustable.
PAGE 7
Refresh features are activated by using the right-click menu shown in Figure 8. Refresh Selection can be used on multiple devices and in any device list. FEATURES AND DEVICE DETAIL Polling exists to provide data for features such as device lists or to trigger events like alerts and automatic groups’ policies. In this way, polling is an essential component of several key features in HP Web Jetadmin. Two of these are alerts and reports.
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Figure 10—Report with device details embedded DEVICE DETAIL—INFORMATION FLOW Other features, including device list exporting, use device data either from storage or from the device itself, depending on the data. These features query device data outside of the poll features that are covered by this document. Figure 11 illustrates this point.
PAGE 9
NETWORK TRAFFIC The following table is an analysis of network traffic related to HP Web Jetadmin. The measurements were taken on an HP network with a variety of printing devices located throughout the enterprise. These measurements may or may not reflect actual network traffic patterns in all environments or for all configurations of HP Web Jetadmin software.