Network printer IP connection drops but only for one user

I have four users in one small office. They are all connected to the network in the same way. There is a Dell 3115 printer on that network. One of the guys has trouble printing to it intermittently.

I did a ping to the printer in question and it will reply for a bit and then time out. At the same time I am doing a ping to a networked HP printer on that network and the ping always replies. While the ping was timing out for this user I did a ping to the Dell printer from another workstation on that network and it always replies.

I'm trying to figure out why just this one workstation has trouble finding the address of that printer on an intermittent basis.

Ideas? Thanks

sdreiskeAsked:
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dhlytleCommented:
Are all connections wired, or is there any wireless connections involved?
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sdreiskeAuthor Commented:
He and all of the other users are wireless to the router. The printer is wired to the switch.
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bhartwellCommented:
Definitely sounds like either a faulty network cable or there may be an application running on his machine that is consuming the bandwith or interferring with his print jobs. Possibly his antivirus scanner is running during those particular times.
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sdreiskeAuthor Commented:
Hmmm. I hadn't thought of antivirus causing a problem. Let me see what he has loaded.

I have ruled out cabling because the other laptops on the network are able to get a reply from a ping when his machine cant.
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Hugh FraserConsultantCommented:
It could be an IP address conflict. If you have multiple wireless APs that are handing out DHCP leases, make sure they don't overlap. Also, if the printers have static addresses, make sure they're not in any DHCP scopes.
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dhlytleCommented:
If distances permit, I'd try to go all wire to the problem workstation as a test to see if the problem persists.
If nothing else, that would eliminate the wireless part of the network as a contributor to the problem.
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dhlytleCommented:
Another thought, adding to hfrazer's comment.  I created a mess on my home NT network when I had IP addresses managed both my the Network OS and the router.  Only one workstation had a conflict, but did it produce some weird intermittent problems.
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sdreiskeAuthor Commented:
The problem was that I had two devices handling DHCP. I changed the router to do DHCP relay to the server and problem solved. Not quite sure why both were set handle it. Thanks for the help.
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