I am using an app based on APPIQ that uses SMI-S and found that the user I had to use needed a network admin role for priviliges to do what it needed to do. I originally tried network operator but it completely ignored that user as it could not even get enough information to populate its data. Same for SNMP.
Would anyone care to share any (hopefully success) stories on SMI-S? Also be warned that SAN-OS 3.3 and above uses SMI-S 1.2.0 which will probably mean an (in my case, a major) upgrade for your SMI-S software. What happened with backward compability? Whats NX-OS 4.1 going to be like?
Give me SNMP any day.