Looks like you ar ein the ballpark here:
NetBackup:
6.5 & 7.0 with Data ONTAP 8.0.x 7-Mode and Clustered DATA ONTAP®
7.1 and 7.5 with Data ONTAP 8.1.x 7-Mode and Clustered DATA ONTAP
7.5 with Data ONTAP 8.2.x 7-mode & Clustered DATA ONTAP
7.6 with Clustered DATA ONTAP 8.3.xI *think* you may need to create a new management LIF to let the data flow out.
I do not remember for sure, but if you are saavy enough....try a dump, and then examine the packet traces....it will tell you where it is trying to send the data.
I will try to look it up, but it was some odd thing where the request came into the SVM-scoped vserver and the data wanted to go out the management interface. We created a new mgmt lif on the same subnet as the SVM at I think that allowed the data to flow out.
Now, this may or may not be a netapp bug, I do not recall. It may behoove you to also update your netApp to a current release and try again.
Be sure you are NOT using NODE-SCOPED ndmp, and you are configured for SVM-SCOPED NDMP
--tmac