I think it is the same thing when I was using BE and trying to backup CIFs shares on a filer. Its because the BE server tries to connect on port 10000 which is normally used for NDMP on a filer. BE server would expect an agent (process=beremote.exe) on this port but in this case its NDMP listening which it cannot communicate with.
Disable NDMP on the filer or create a symlink to the CIFS share locally on your BE servers file system using the mklink command. Then back this up in the selection list choosing to follow symlinks/mount points.
We're also using BE12 and Ontap 8.1 but with a 3240. Same issue. NDMP is disabled on the filer. We're able to map the CIFS shares on the BE server using the service account but are presented with "a network connection to the server could not be established" when trying to add them as a selection within BE. Our BE server runs Server 2003 and so we can't use Symbiotic Links. Any suggestions?
We are running BE12 and I was experiencing the same problem. Turnin goff ndmpd , really worked. I could connect to shares but would not allow backups or selections. Once I turned off then I could at least backup but what bugs me is, when I test Operator credentials, it reports failed but you I can just open the shares fine on the same machine. I created account called backup op and it has full access to all the shares from windows side (no problem here) but thru BE, When I click on test access it fails. Kind of annoying but at least it is finishes backups. I just wish it was a bit faster. It takes shorter time to back windows boxes than netapp.