I want to know which template stands for GENERIC
this switch is auto discovered,netxms how to check which snmp driver should be used?
In other words, how can I add more manufacturer features to this
Driver is unrelated to templates, it's a loadable server extension which provide vendor (or device) specific information which is either not available via common SNMP OIDs, or not available via SNMP at all (like physical ports layout on the switch).
GENERIC is a default driver for all devices which works in standard way. In ideal world it would be the only driver in the system.
You can check sources here: https://github.com/netxms/netxms/tree/master/src/server/drivers.