HP Designjet Universal Print Driver Manual de usuario Pagina 145

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6. Distinguish if target product is communicating bidirectional for printer auto
configuration via HTTP or SNMP?
Bidirectional communication over the network could occur via HTTP and SNMP dependent upon target device. Errors
specific to the protocol:
HTTP
a. Does the device support hp job capabilities ticket? To determine,
http://device_ip_address/hp/device/JobCapabilities/JobCapabilitiesTicket.zip
b. Is HTTP port 80/tcp enabled in the \ % SystemRoot %\System32\Drivers\Etc\services file?
c. Does the HP UPD installed host firewall allow HTTP traffic?
d. If the target product is on a separate subnet, does the network route HTTP traffic?
SNMP
a. Do community names of the installed HP UPD host match the community name of target print product?
b. Does the HP UPD installed host firewall allow SNMP traffic?
c. If the HP UPD installed host is on a separate subnet, does the network route SNMP traffic?
d. Is SNMP routing disabled? Wireless network security often disables SNMP routing as a security measure.
7. Install and test a new print queue?
Reducing complexity to isolate variables. A simple test is to install the HP UPD driver downloaded from
www.hp.com/go/upd using the default installation options onto a clean system. This ensures the driver has not been
pre-configured before installation, that upgrade from one version to the next in a contaminated environment is
reduced, and the print queue itself is new and self-managed. During installation, create a new print queue targeted to
a device with an address on the test machine’s subnet.
8. Is the network congested?
HP UPD bidi uses the SNMP protocol, which is carried on the network using the HP UPD protocol. HP UPD packets
are low priority, and can be discarded if the network is congested.
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