We have a 6509 switch with Sup-II module. Just wondering how I can login to the MSFC and configure routing
If it is in native mode, you are in RP(MSFC) now. If you want to log into SP, you can try "remote login switch"
The you dont need to access the MSFC, your on it. Config your routing from global configuration mode.
So for ospf do:
Core_1(config)# router ospf 1