This happens due to last SSH session was not terminated properly or not timed out.
Do you have a trusted SSH or RSH client configured for your netapp filer ? I mean where you can issue commands password less ( SSH key was already added in to the client ) if yes then you can do a "rsh filer_name logout telnet" or "ssh filer_name logout telnet".
Ex:- LinuxClient> rsh <netapp_filer> logout telnet
Thanks,
Nayab
**If my reply solved your issue please help to mark it as solution**