Problem / Error: BMR / system State Backups failing -MSDPM 2012 R2

Cause: BMR was failing with the following error as there was no permission on the shared folders.

Windows Backup encountered an error when accessing the remote shared folder. Please retry the operation after making sure that the remote shared folder is available and accessible. ID 517

Resolution:

Recreated the Protection Group which resolved the issue for some time but then it again reoccurred. So followed the following steps.

         Disabled chimney offload and other SNP features on the DPM server's NIC.

         Following are the commands to disable chimney offload and other required features:

         netsh int tcp set global rss=disable 

         netsh int tcp set global autotuninglevel=disable 

         netsh int tcp set global chimney=disable

         From the Network Adapter properties disabled the following:

         Disabled the IPv4 Checksum OFFload

         Disabled Large Send Offload Version 2 (IPv4)

         Disabled Large Send Offload Version 2 (IPv6)

         Disabled TCP Checksum Offload (IPv4)

         Disabled TCP Checksum Offload (IPv6)

         Disabled UDP Checksum Offload (IPv4)

         Disabled UDP Checksum Offload (IPv6)