HP Jetdirect J7974E, Руководство администратора

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If a default IP address is assigned, the address will depend on the network to which the print server is
connected. The print server senses broadcast packets on the network to determine the appropriate
default IP settings:
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On small private networks that adhere to automated, standards-based IP address assignments,
the print server uses a link-local addressing technique to assign a unique IP address. Link-local
addressing is limited to a local IP subnet (not routed) and may be referenced as
Auto IP . The IP
address assigned will be in the range of 169.254.1.0 to 169.254.254.255 (commonly referenced
as 169.254/16). However, it can be further modified for your network using supported TCP/IP
configuration tools if necessary.
With link-local addresses, subnetting is not used. The subnet mask will be 255.255.0.0, and cannot
be changed.
Link-local addresses will not route off the local link, and access to or from the Internet will not be
available. The default gateway address will be the same as the link-local address.
If a duplicate address is sensed, the HP Jetdirect print server will automatically reassign its address,
if necessary, in accordance with standard link-local addressing methods.
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On large or enterprise IP networks, a temporary address of 192.0.0.192 will be assigned until it is
reconfigured with a valid address through supported TCP/IP configuration tools. We refer to this
address as
Legacy Default IP .
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On mixed-environment networks, the self-assigned default IP address may be either 169.254/16
or 192.0.0.192. In this case, you should verify on the Jetdirect configuration page that the assigned
default IP address is as expected.
The IP address configured on your print server may be determined by inspecting the Jetdirect
configuration page for the print server. See
HP Jetdirect Configuration Pages .
Default IPv4 Address Configuration Options
Default IPv4 Parameter
A Default IP configuration parameter on the print server controls how the default IPv4 address is
assigned. Whenever the print server is unable to obtain an IP address during a forced TCP/IP
reconfiguration (for example, when manually configured to use BOOTP or DHCP), this parameter will
determine the default IPv4 address to use.
When the print server is in a factory-default state, this parameter is undefined.
If the print server is initially configured with a default IPv4 address (either a link-local IPv4 address or
the legacy default 192.0.0.192 IP address), the Default IP parameter will be set to either
Auto IP or
Legacy Default IP to match.
The Default IP parameter can be changed through a supported configuration tool, such as Telnet, a
Web browser, a printer control panel, and SNMP management applications.
DHCP Requests Enable/Disable
When a default IPv4 address is assigned, you can configure the print server to send, or not send, periodic
DHCP requests. DHCP requests are used to retrieve IP configuration settings from a DHCP server on
the network. By default, this parameter is enabled, allowing DHCP requests to be transmitted. However,
this parameter may be disabled through supported configuration tools such as Telnet, a Web browser,
and SNMP management applications.
22 Chapter 3 TCP/IP Configuration ENWW