We have a SQL cluster of 2 stand alone servers. We have a SharePoint VM that I can access just fine now and the backup server can ping via DNS and DHCP, however backups are not working at night with the following errors.
Unknown SQL Exception 10060 occurred. Additional error information from SQL Server is included below. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)