8

On Windows Server 2008 R2 core I use dism.exe and the featurename: 'NetFx3-ServerCore' this feature is not available on Server 2012 (Windows Server 8).

Using the standard 3.51 Installer on Server 2012 Core tells me: "You must use the Role Management Tool to install or configure Microsoft .NET Framework 3.5"

In the GUI version (of Server 2012) I can do this and it downloads a package from Microsoft.com, but how do I do this on Core?

Improve this question
2
  • what does dsim /online /get-features /format:table tell? Commented Apr 30, 2012 at 7:50
  • @DmitriChubarov among many other things it has 'NetFx3ServerFeatures | Disabled' and 'NetFx3 | Disabled with Payload Removed'. When I do a 'dism /online /enableFeature /featurename:NetFx3ServerFeatures' it says it enable the feature in a few seconds, but still dotNet 3.51 is not present on the machine. (using build 8250) Commented Apr 30, 2012 at 8:09

3 Answers 3

Reset to default
8

You can use Powershell to show the available Windows Features:

Import-Module ServerManager Get-WindowsFeature | out-file C:\WindowsFeatures.txt -width 300

Because the data is a long and wide it is better to pipe it into a file and review it there.

it shows that '.NET Framework 3.5 Features' are available, but '.NET Framework 3.5 (includes .NET 2.0 and 3.0)' has been removed.

However, the files are still on the DVD, you can use:

dism /online /enable-feature /featurename:NetFX3 /source:D:\sources\sxs /all /LimitAccess

or the PowerShell 'Add-WindowsFeature' commandlet to install it:

Add-WindowsFeature –name NET-Framework-Core -source D:\sources\sxs

Edit: On Server 2012 R2 with Update 1 installed (KB2919355) this doesn't work if you are using the original DVD/ISO. You need a DVD or ISO which includes that update. For new installations, install .NET 3.5 before you apply KB2919355.

Improve this answer
5

dism /online /enable-feature /featurename:NetFx3 /All /LimitAccess /Source:x:\sources\sxs

Where x: is the drive letter of the installation media or mapped network share that contains a copy of the installation files.

Improve this answer
1
  • 1
    Thanks this worked great, although I had to add the /all flag dism /online /enable-feature /all /featurename:NetFX3 /source:D:\sources\sxs Commented Jun 3, 2012 at 23:26
2

A Windows update may be causing the problem: KB2966827 i.e. An update for 3.5 was installed even though the feature wasn't installed

Read here at the very bottom in the comments: http://social.technet.microsoft.com/Forums/windowsserver/en-US/5c16b88a-0f19-4aea-ad65-38f0bdb59b9c/install-net-framework-35-on-windows-server-2012-behind-the-firewall-does-not-recognize-sources?forum=winserver8gen

Improve this answer

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.