Windows Server 2016 - Problem with network discovery

Jonathan Weidner 96 Reputation points
2021-04-06T10:02:53.107+00:00

Hi guys!

I hope you can help me. A customer needs to see the other domain servers in network area of the Windows Explorer for some Siemens legacy software. Following some other articles that should be very easy, but I'm experiencing a problem: The servers in the domain can't see each other, at least in the network area of the explorer, they can only see them self. Except for one of the 5 servers, which can see the other 4 members. I compared the settings a couple times and the only visible difference was the already activated SMBv1 feature, but even after reactivating that old stuff on 2 other domain members doesn't made it somehow better.

We are talking about 5 Windows Server 2016 VMs, which are in the same subnet and can access each other without problems.

What I've done so far:

  • Ensured, that DNS, Function Discovery (both services), SSDP and UPnP services are running
  • also read something about WinRM - it's active too
  • Re-enabled SMBv1 and made sure, that Computer Browser is running (shouldn't be necessary, but it doesn't works anyway)
  • activated network discovery in network and sharing center
  • also set "Turn on Mapper I/O (LLTDIO) driver" and "Turn on Responder (RSPNDR) driver" to enabled for domain via GPO
  • triplechecked, that Windows Firewall is turned off
  • reset network settings on one server via "netsh int ip reset" and "netsh winsock reset"
  • several server restarts

I really don't know what's the problem, I hope somebody can help!

Best Regards
Jonathan

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
2,521 questions
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Accepted answer
  1. Jonathan Weidner 96 Reputation points
    2021-05-07T12:03:01.647+00:00

    We were finally able to solve the problem! The source of our problem was a bug in our firewall appliance. The necessary igmp querier for Multicast (WS Discovery) didn't work properly. After an update package from the manufacterer, we were able to use the network discovery feature like intended.

    Thank you all for your time!

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  1. Jonathan Weidner 96 Reputation points
    2021-04-15T08:30:29.653+00:00

    I will reply to this thread, when the support gots a solution for that behaviour.


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