Just on this statement 'btw this is SVM is purely used for FC connection. no CIFS services or data lifs are configured':
For iSCSI and FC protocols, a dedicated SVM management LIF is required because data and management protocols cannot share the same LIF. Just wanted to make sure you are using a separate mgmt lif.
What's the output:
::>network interface show -vserver <vserver> -data-protocol none