HP UPD - System Administrator's Guide HP UPD 5.6.5

g. Can the UPD client host gain access to the device's HP Embedded Web Server? http://
device_ip_address or https://device_ip_address
h. Are there network issues such as denial-of-service at the print server or printing device, network service
interruption, or unauthorized and privileged access to the target print device or print server?
i. Is the TCP filter enabled? TCPIP→Advanced→Options tab→Properties (types of traffic allowed to pass
to the TCP protocol)?
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 is 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 taken from
www.hp.com/go/upd using the default installation options onto a clean system. This insures 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 SNMP protocol, which is carried on the network using HP UPD protocol. HP UPD packets are
low priority, and can be discarded if the network is congested.
ENWW Troubleshooting 81