Server 2008 R2 lost internet connection

I have a server 2008 R2 Domain controller , file server.
It has lost internet connection.
It can ping the other servers on the network but cannot ping the router.
Host unreachable.
All network connections are fine.
LVL 5
josephwalshAsked:
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rhandelsCommented:
What happens if you do a tracert?? And did anything change in the router configuration? Is your entire network (and the router) on the same subnet??
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Thomas GrassiSystems AdministratorCommented:
I have seen this on Windows 2008 servers

Does your router have a limit of the number of internet connections allowed?

Try clearing arp cache on router and on server
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josephwalshAuthor Commented:
I found the problem.
I reset the switch to which the router and server are attached, and all came back to normal.
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josephwalshAuthor Commented:
A process of elimination.
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Windows Server 2008

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