HP Web Jetadmin Software Instrukcja Użytkownika Pobierz pdf (Strona 10)

Resources MIB are blocked because the PC might also support those OIDs. HP SNMP Proxy

Agent directs on top of the SNMP service. HP SNMP Proxy Agent redirects objects intended for

the device to the device and objects intended for the PC to the PC. For security reasons, HP

SNMP Proxy Agent must block configuration SNMP Set Request packets that might apply to the

PC, such as those found in MIB-II and Host Resources MIB. Items under Networking fail because

they are set on the PC. The following are examples of the configuration items that are blocked:

• SNMP Trap Table

• System Contact

• System Location

• Set Community Name

• Get Community Name

• The devices that HP WS Pro Proxy Agent discover do not have restrictions between configuration

items applying to the PC or printer because the PC does not support the Web Services calls.

Alerts

It is possible to monitor device alerts through the proxies. However, the number of alerts that can be

monitored are limited to only the alerts that polling supports. HP Web Jetadmin cannot process traps

through the proxies. Therefore, the alerts in the General category that use traps are not supported.

Reports

If the proxy discovers devices that display supply levels and page counts, the devices can be added

to Data Collections and reports can be generated on the data that is collected.

PROXY COMPARISON

Recall earlier it was stated that the level of support for each device depends on the following

variables:

• Which proxy discovered the device

• How the feature is exposed on the device

• How HP Web Jetadmin is defined to retrieve or configure the feature

HP Web Jetadmin can use a variety of techniques to retrieve or configure information, such as SNMP,

DSMP, XDM, LEDM, and WS*. HP Web Jetadmin uses only one technique to support each feature on

a specific device. If a device supports LEDM and a feature is exposed via LEDM, HP Web Jetadmin

supports the feature using only LEDM for that device. Even if the device also exposes the feature

through SNMP, HP Web Jetadmin uses the preferred technique of LEDM. This plays an important role

in what each proxy supports on a given device.

If HP SNMP Proxy Agent discovers the device, it exposes only the features that HP Web Jetadmin uses

SNMP to support on that device. If HP WS Pro Proxy Agent discovers a device, it exposes only the

features that HP Web Jetadmin uses LEDM to support on that device.

For example, the HP LaserJet 400 M401 device supports both SNMP and LEDM. Each feature is

supported using only one technique. If a feature is exposed through LEDM, HP Web Jetadmin uses

LEDM, regardless of whether the feature is also exposed through SNMP. It does not matter which

proxy discovers the device. HP Web Jetadmin uses only LEDM for those features. This means that if

HP SNMP Proxy Agent discovers the device, most features are not supported because HP Web

Jetadmin must use LEDM.

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HP Web Jetadmin Software Instrukcja Użytkownika Strona 10