Have you tried SNMP v2 just to see what OIDs you can get? If that works, you may actually have a problem with the SNMPv3 setup and not SNMP in general.
What is your "view" definition? It will restrict (or not) the OIDs available for you to see. Also, an snmpwalk [all the options you need] IP 1 will give you a full walk of all trees available for you, standard, enterprise and special. The 1 indicated...
A case is almost always required if the version is actually released. It has then passed QA testing and is considered OK with some remarks in the release notes and some secret CFDs they won't reveal. Anything else neds to be detected and reported by ...
