No Network connection

Something strange just happened with a server 2008 R2

I am able to ping other devices on the network either by ip addres or by dns name.  works fine.

But, when I use windows explorer or try to reach shares using \\servername or \\ip address I get name not found on network.

Also, when I try browsing the network nothing shows up.
BufflAsked:
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JohnBusiness Consultant (Owner)Commented:
Run TCP/IP Reset:

Open cmd.exe with Run as Administrator
Then  netsh int ip reset c:\resetlog.txt
Also, ipconfig /flushdns followed by net stop dnscache followed by net start dnscache
Then restart the Server (need a convenient moment).
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BufflAuthor Commented:
I ran the commands and restarted the server. no improvement on the problem.
Scared me because it removed the server ip address in the ip4 config

Also, I can not find the log/txt file.
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JohnBusiness Consultant (Owner)Commented:
Are you trying to use multiple network cards?

You might also consider updating the LAN drivers for the NIC.
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BufflAuthor Commented:
the nics are trunked...and it seems to be working fine.

As I said I can ping servers on the network by ip and unc...I just can't view them and connect to their shares.
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BufflAuthor Commented:
Also windows firewall is totally disabled and not running
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JohnBusiness Consultant (Owner)Commented:
Look in Networking and the properties of the NIC and make sure Client for Microsoft Services is installed. If it loses it bearings, you won't be able to connect to shares. That happened on my Windows 81 machine and reinstalling Client for Microsoft Services fixed that.  If this is the issue, you will have to restart.

Also run System File Checker. Open cmd.exe with Run as Administrator. Run SFC /SCANNOW and allow to complete. Best if you can restart . Then test again.
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David Johnson, CD, MVPOwnerCommented:
is the browser service running?
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BufflAuthor Commented:
No the computer browsing service is disabled like on all my servers and this was working fine unitl about 2pm today.  No updates have been done either.
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BufflAuthor Commented:
Client for microsoft networks is available and checked in the nic properties and am running the sfc scan now
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JohnBusiness Consultant (Owner)Commented:
Please let us know about SFC.

Another tool, but I am not sure if it will run in Server 2008 is DISM.

Open cmd.exe with Run as Administrator.
DISM.exe /Online /Cleanup-Image /Scanhealth (takes 15 - 20 minutes).
DISM.exe /Online /Cleanup-Image /Restorehealth (takes 15 - 20 minutes).
Restart the computer and test.
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BufflAuthor Commented:
What does it do?
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JohnBusiness Consultant (Owner)Commented:
DISM replaces more components than SFC and starting with Windows 8.1 and newer Server systems is a good fix routine for system level difficulties.
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BufflAuthor Commented:
sfc scan didn't find anything wrong

rebooting....still not getting anything.  If I uninstall microsoft networks or even the microsoft file sharing protocols and reboot...how will I get them to install back again?  Just click install?
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JohnBusiness Consultant (Owner)Commented:
If you are talking about the two things in the Properties of the NIC (Client for Microsoft Networks and File and Print Sharing), yes, you will get them back if you uncheck, restart, re-check and restart, but I do not that they are the problem since installed and working.
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BufflAuthor Commented:
tried the DISM tool and got /scanhealth is not recognized in this context
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JohnBusiness Consultant (Owner)Commented:
Yes, I thought it worth a try, but I recall reading before it does not necessarily work on Server 2008.

I do not know what other things you might try or what went wrong. All my client servers all have working network connections.

At then end, you may need to consider backup and reinstalling the server.
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BufflAuthor Commented:
oh I so hope that is not the case...
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BufflAuthor Commented:
I want to thank you all for the help.  I figured it out with a bit of help from the internet.

So I was able to get things running again.

it is either 1 of 2 things;

1-I went ahead and installed all the updates there were queued to install, that could have reset something

2-I found an obscure reference to a registry key in a post
https://social.technet.microsoft.com/Forums/windowsserver/en-US/4d40dd77-3c1f-4c94-9688-a8a710870a86/windows-2008-r2-server-unable-to-browse-unc-shares

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\NetworkProvider\Order]

I checked it and it had a bunch of grabage in it, that I don't know how it got there.  I cleaned it out and made it look like other servers.  

Restarted after both and now my shares are working again, I can access other servers and network is finding devices.

So, personally I would lean towards the registry key, because it had some stuff like ;PDVFSNP,CbFs3,RDPNP,LanmanWorkstationts\\pdfs㯚卛

I cleaned it up to PDVFSNP,RDPNP,LanmanWorkstation
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BufflAuthor Commented:
Because it wasn't my solution I just happened to get lucky and find it.
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Windows Server 2008

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