Now, ServerManagerCMD on Windows Server 2008 R2 is deprecated! You should use Powershell modules to install or remove roles and features.

If you need to install IIS with all subfeatures:

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Import-Module ServerManager
Add-WindowsFeature Web-Server -IncludeAllSubFeature

If you need to remove a feature:

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Import-Module ServerManager
Remove-WindowsFeature *Name*

If you need to get all features:

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Import-Module ServerManager
Get-WindowsFeature

If you need to install all Web features:

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Import-Module ServerManager
Get-WindowsFeature Web-* | Add-WindowsFeature

You need to change your automation scripts if you have :)