I have a server that is host a MSSQL database and some other server related tasks.
The server communicaties with a large number of devices. The devices send data to the server.
The communication links are down between the devices on the intranet and to the outside world. However it seems I can ping and can be pinged from machines on the same switch.
This includes the DNS Servers.
When I run,
RPC Server is Unavailable.
So, it seems that the server can not verify the DNS server. Both DNS server are up and running. No other machines are affected on the network.