IP Address Won't Route to One Server

I have a DHCP server running on my Win2K8 R2 DC.  The configuration has been in place for years, having migrated from Win2K to Win2K3 to Win2K8 R2.  The DHCP range is set from 192.168.1.100 to 192.168.1.254 with no reservations or exclusions.  I also push out the DNS and gateway settings.  About three weeks ago one IP address in the range stopped reaching a single server on the network.  By this I mean that the workstation that picked up the offending address (.147) could ping and access all other servers on the network and reach the Internet but could not ping or access one specific server.  When this first appeared I assigned a static address and the problem went away.  The next week I removed the static IP and renewed DHCP and there were no problems because the PC picked up an address that was not .147.  Over the past two weeks the .147 address has been picked up by several different users.  Each time I temporarily assign a static address to resolve the problem.  I am at a loss as to what would cause one address out of 154 to stop routing to a single address.  I have created an exclusion in DHCP to prevent the problem from occuring again until I find a solution.  Can anyone tell me what the heck is going on?
jduehmig1Asked:
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Fred MarshallPrincipalCommented:
I would reboot all the intervening devices - switches, routers, etc.  This sounds like one of those unexplainable things that happen when one of those devices "goes crazy".

Things that come to mind:

arp caches
I would use something like PingScannerPro to ping the entire range and directly thereafter run
arp -a
on a machine that has this problem.
Of course that doesn't update other arp caches necessarily (rebooting devices should) but maybe there will be some insight.

Might that server have a *second* IP address assigned to the one NIC that happens to be .147?

What does the server routing table look like?  You might get it and send it here.  Maybe there's a persistent route involving .147.

It seems most possible that the server involved is at the core of this issue.

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jduehmig1Author Commented:
ARP cache is the only thing that would make sense to me as well.  Unfortunately I did not get a chance to reboot all the switches over the weekend.  The server in question does have two IP addresses but nothing in the DHCP range.  Interestingly the problem appears to only affect Windows 7 users.  We are in the middle of a Win7 rollout for 150 users.
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Fred MarshallPrincipalCommented:
I would believe two server IP addresses on two NICs.
But, just to be sure, what about multiple IP addresses on ONE NIC?
What does the server routing table show?
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jduehmig1Author Commented:
The server has had two IP addresses on a single NIC for about five years with no problems.  And the error isn't that server not responding to a ping, it is the PC receives a 'destination not reachable' error.
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BawerCommented:
uncheck ip v6 in to that windows 7 pc, it may have dhcp enabled on that range, and ur ping would be routed to some other path,
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jduehmig1Author Commented:
I found that the customer had assigned static addresses to a number of printers and other devices on the network using the addresses in the DHCP range.  Funny they forgot to mention this when they reported the problem.  Thanks for everyone's help.  It was the simple answer that worked.
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jduehmig1Author Commented:
The customer assigned static addresses without informing anyone.
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