HP Web Jetadmin Software Instrukcja Użytkownika Strona 163

  • Pobierz
  • Dodaj do moich podręczników
  • Drukuj
Przeglądanie stron 162
Network-Connected Device Discoveries
HP Web Jetadmin uses several methods to nd devices that are connected directly to the network. Regardless of
the method used, HP Web Jetadmin rst nds nodes on the network. Then HP Web Jetadmin determines if the
nodes are qualied printing or imaging devices by using the SNMP protocol to query the nodes for specic SNMP
objects. HP Web Jetadmin adds the qualied devices to the database and displays them in the All Devices list.
In most cases, the IP addresses for devices are static. However, IP addresses can change in some situations,
such as when the device is moved or DHCP is used to assign device addresses. In these cases, HP Web Jetadmin
automatically changes a device’s IP address in the database when it detects a change in that IP address.
PC-Connected Device Discoveries
HP Web Jetadmin can discover printers that are connected directly to PCs. A PC-connected device discovery
queries the local PCs to nd devices that are connected to an LPT port or USB port on the local PC. HP SNMP
Proxy Agent is a small software package that facilitates the communication between HP Web Jetadmin and the
PC-connected devices. If HP SNMP Proxy Agent is installed on a PC, HP Web Jetadmin gathers detailed
information about the connected devices. If HP SNMP Proxy Agent is not installed on a PC, HP Web Jetadmin
gathers only a minimal amount of device information about the connected devices.
When a PC-connected device discovery runs, HP Web Jetadmin communicates directly with the local PC in one of
the following ways:
HP SNMP Proxy Agent—HP Web Jetadmin looks for HP SNMP Proxy Agent on the PC. If HP SNMP Proxy
Agent is installed, HP Web Jetadmin queries the device through the proxy agent in much the same way as it
queries devices that are connected directly to the network. Many pieces of information about the devices
are available, such as the status, page count, and supply levels.
Windows Management Instrumentation (WMI)—WMI is a Microsoft service that runs on most Windows
operating systems. Remote management applications use WMI to gather information. HP Web Jetadmin
performs a query through WMI on the PCs that are found by using the various discovery methods. This
query attempts to resolve Windows printer model details for devices that are plug-and-play compatible.
The WMI PC-connected discovery solution does not gather the status or other details from the device. The
WMI PC-connected discovery requires administrator (local) credentials on each host queried.
PC-connected device discoveries use dierent query protocols depending on the discovery method. The
following table shows the primary and secondary protocols for each discovery method. If communication is
possible by using the primary protocol, HP Web Jetadmin queries the devices. If communication is not possible
by using the primary protocol, HP Web Jetadmin uses the secondary protocol to query the devices.
PC-connected device discovery method Primary protocol Secondary protocol
IP Broadcast SNMP
WMI
1
IP Range SNMP WMI
Specied Addresses SNMP WMI
Active Direct
ory SNMP WMI
Domain SNMP WMI
1
IP Broadcast discoveries send an SNMP query to a broadcast address. IP Broadcast discoveries nd devices through WMI only if the PC is
capable of res
ponding to SNMP queries. The SNMP service must be enabled on the PC for it to respond to SNMP queries.
Discoveries that use the WMI protocol require administrative access to the PC that is being queried. The local
administrator password can be used. However, in many environments a domain user is granted administrative
ENWW Discovery 137
Przeglądanie stron 162
1 2 ... 158 159 160 161 162 163 164 165 166 167 168 ... 491 492

Komentarze do niniejszej Instrukcji

Brak uwag