Here's a tip from my colleague Ed Wilson (the Microsoft Scripting Guy) about how to use PowerShell to clear the DNS cache on remote comptuers:
Question: You suspect DNS cache corruption, and want to clear the cache on your remote Windows 8.1 computers. How can you use Windows PowerShell to do this?
Answer: Use the Invoke-Command cmdlet to run the command on the remote computers. Use the Clear-DNSClientCache to perform the clearing. This technique is illustrated here where the DNS cache is cleared from three computers named c1,c2 and c3:
Invoke-Command -script {Clear-DnsClientCache } -ComputerName c1,c2,c3
NOTE: you will need to run the above command with admin rights
Mitch Tulloch is a nine-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows administration, deployment and virtualization. For more information see http://www.mtit.com.
Ed Wilson is the bestselling author of eight books about Windows Scripting, including Windows PowerShell 3.0 Step by Step, and Windows PowerShell 3.0 First Steps. He writes a daily blog about Windows PowerShell call Hey, Scripting Guy! that is hosted on the Microsoft TechNet Script Center; for more PowerTips check out the Hey, Scripting Guy! blog.