The NetApp Harvest IAG says "Harvest communicates with monitored systems exclusively via HTTPS using TLSv1". The TLSv1 protocol may be disabled on the cluster. When FIPS 140-2 compliance is enabled, TLSv1 and SSLv3 are disabled. ONTAP prevents you from enabling TLSv1 and SSLv3 when FIPS 140-2 compliance is enabled. Check to be sure TLSv1 is enabled to allow communication.