HP Laserjet printers - HP Standard TCPIP Port unstable

We have 2 current HP laserjet printers (4515x and 2605) and recently added two more new HP laserjet printers (4005 and 4345).

When installaing the new HP printers using the bundled installation CD:
1. All Win XP Pro 64 bit PCs can detect both 4005 and 4345 printer using IP address configuration,
2. Some Win XP Pro 32bit PCs are unable to detect the 4345 MFP using IP address settings (but can ping the IP).
3. After 2 ~ 3 days some Win XP Pro 64bit PCs are unable to print to the new printers (just the usual print job failure error message).
4. I noticed the HP installation CD creates printer ports using HPDIU_*.*.*.* instead of the Standard TCP Port "IP_*.*.*.*" it seems like the PC is no longer able to print to the printer (dropped connection).
5. I have tried rebooting PC, rebooting printer but it does not resolve.
6. After I re-added the printers using Standard TCPIP ports, printing is stable.

Does anyone knows the problem with the HPDIU ports and how to overcome the "dropped connection" to the printers (using HPDIU ports).
artradisAsked:
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ComputerTechieCommented:
is the printer using a fix ip or dhcp?
is the printer connect to same switch as the computers?
Are you using a server?
if so you can install on server then have the users connect  the printer via network connect.

if using dhcp try fixing the ip address.'

CT
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artradisAuthor Commented:
Hi,

1. The Printers are on static IP and same subnet,
2. The printers are on the same LAN but possibly on a different switch - we have a 24 port and 48 port Gigabit switch connected by cross cable.
3. The Win XP Pro 64bit  PC have no problems connecting to the printer during installation, but after 3 days, they are no longer able to connect to the printer (configured using printer IP , not printer host name).
4. The Win XP Pro 32bit PCs most could not even connect to the 4345 MFP printer using IP address , even thought at the PC it is able to ping the IP address.

It appears to me that the new HP Port "HPDIU_*.*.*.*" is unstable, given the expectation for HP printers and Jetadmin to be reliable and low maintenance (if configured using Standard TCPIP ports in Win XP).

I am wondering if there is anything I need to be aware of, given HPDIU may be the new technology and time for me to learn something new.
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ComputerTechieCommented:
I would try a new firmware update for the printer.

CT
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hdhondtCommented:
My normal recommendation is *not* to use manufacturer-specific TCP/IP ports. They may add some minimal additional functionality, but it's not worth the potential problems. Instead, use the "Standard TCP/IP port" that ships with Windows. As you say: using those ports, printing is stable...
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