Here's a great article published by Microsoft: System Center Data Protection Manager 2010 Hyper-V protection: Configuring cluster networks for CSV redirected access Those of you who have ever worked with DPM 2010 and the protection of hyper-v guests
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Read the complete post at http://scug.be/blogs/scdpm/archive/2011/01/04/configuring-cluster-networks-for-csv-redirected-access.aspx