HP Web Jetadmin Software Manuale Utente Scaricare il pdf (Pagina 10)

 Fast and thorough, especially on a local

segment

 Most modern networks block broadcast traffic

 PC discovery settings are the same as

network discovery settings

 May not find PC-connected devices without

the HP SNMP Proxy Agent

IP broadcast discoveries send SNMP query

packets in the form of IP broadcasts, to one or

more IP network(s). One network-specific

broadcast address exists for each IP subnet on an

IP intranet. In addition, a broadcast containing

only “1” in all its digits can be used on any IP

network (HP Web Jetadmin uses this as the

default IP broadcast address). IP subnets are

determined by the IP network number and the IP

subnet mask.

Administrators can calculate and enter any variety of IP broadcast addresses into the Select IP

broadcast address pane in the Device Discovery wizard (Figure 12). IP range calculators, available

for free on the web, are a great way to determine IP broadcast addresses. Broadcasting is typically

blocked by routers due to traffic spike concerns.

IP range discovery

IP range discovery is the most powerful way to discover all or nearly all devices in an enterprise. The

Select IP ranges interface is used to add, remove, or edit IP range data (Figure 13). IP ranges can also

be imported from or exported to flat text files. The Calculate range feature adds IP ranges based on

the client host, server host, or known IP address information. Large subnet protection is engaged by

default which keeps the application from spanning too many addresses, unless absolutely necessary.

Characteristics of IP range discoveries are:

 Discovers both PC-connected and network devices

 IP ranges are simply two addresses that represent range begin and end points

 Multiple ranges can be specified

 Users can manually edit or import ranges

from a file

 Descriptive tags help to identify ranges

 Application sends one query to each address

represented by the range

 HP Web Jetadmin pings the device ranges in

bursts, which limits the network footprint

 Calculator feature adds IP ranges based on:

 Local client host

 HP Web Jetadmin server host

 Device

 Can be very slow if not configured properly

 Can draw security attention

Figure 12—Select IP broadcast address pane

Figure 13—Select IP ranges pane

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 21 22

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HP Web Jetadmin Software Manuale Utente Pagina 10

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