.NET 3.5 off line install from DVD

Unable to install .NET3.5 from roles because of no internet connection?
Note: .NET 3.5 needed for SQL 2014 and other applications

Follow this guideline https://support.microsoft.com/en-ie/kb/2734782

In summary:

  • Insert W2012R2 install disk
  • Run CMD with Admin privileges
  • Run the below command (change drive letter to correct DVD drive)
Dism /online /enable-feature /featurename:NetFx3 /All /Source:<drive>:\sources\sxs /LimitAccess