Created small domain - But now cannot ping any of my devices that i added

Created Server 2012, DC, AD/DNS/DHCP are working fine.
Added 7 devices to this domain with no issues.

Devices have appeared in AD/DNS - and all appeared fine.

I could ping from server, also from each device, no issues.

Came in today and cannot ping anything, all services look ok, nothing on event viewer.

Have restarted DC - no change, can ping nothing.
when I use arp -a, they all appear.. Any ideas?
Darrin CrawfordAsked:
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Patrick BogersDatacenter platform engineer LindowsCommented:

Is file and printer sharing enabled in advanced nic properties?
Is network Discovery enabled?
All Yes? Temporarely disable the firewall and test again....

Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
Can you ping any of the devices from each other?

Is your Server issuing out IP as expected?

Can you ping your gateway?

Have you check that there is firewall turn on?

Tom CieslikIT EngineerCommented:
Enable File and Printer Sharing on Firewall on all workstations

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Darrin CrawfordAuthor Commented:
Have checked firewall, have switched off.  Still the same.
Network discovery is enabled., file/printer sharing enabled.

Cannot ping any device from anywhere on domain.

Server is handing out ip addresses.

Was working fine yesterday!
Tom CieslikIT EngineerCommented:
Can you post IPCONFIG /all from server and one affected workstation ?
What happens when you try to ping? And what exactly do you try to ping?
Darrin CrawfordAuthor Commented:
If I ping host name, times out.
If I ping ip address times out.
And if you try to ping a system outside of your network? You could also try going into TCP/IP properties and unchecking IPv6 (do not uninstall it).
Darrin CrawfordAuthor Commented:
I haven't got that far with it as yet.  It is only a test domain.
If I try to ping outside transmit failed, failed in transit.

would expect that though.
Tom CieslikIT EngineerCommented:
Can you post IPCONFIG /all from server and one affected workstation ?
The way this is sounding, and correct me if I'm wrong, NONE of the devices can ping, correct?
Darrin CrawfordAuthor Commented:
NONE of the devices can ping at all!!
Tom CieslikIT EngineerCommented:
I asked you twice to post Ipconfig to help us understand your configuration If you don;t want to do it for some reason, it's going to be hard to help you
Are all of these devices connected to the same switch? And if so, is the switch working properly?

Bear in mind that I am making the assumption that the DC is also serving as the DHCP server since there is no mention of a router or a hardware firewall.
Darrin CrawfordAuthor Commented:
Came in this morning and all machines are pinging as they were on Tuesday.
Thanks for your help everyone

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Darrin CrawfordAuthor Commented:
Was working fine when I came in this morning
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