There is a workaround, although I still am annoyed that NetApp does not seem to be acting on this issue. They must think it is crazy to want to isolate management traffic to a management network….
I got around it by adding entries to my local hosts file on the management server. You have to substitute the management IP for the filer’s main IP. For example, if your first controller is “filer01” and the primary data interface is 192.168.1.2, but the management IP is 192.168.2.5, then you need an entry that says:
192.168.2.5 filer01
Likewise for the second controller. When you manually point System Manager to the first controller and it auto-discovers the partner controller, it will get the mgmt IP from your hosts file. This may impair CIFS/NFS access from the management host, depending on your setup and network location, but it worked fine for us.
Jim