Bay Microsystems Inc., a San Jose, Calif.-based provider of packet processing and traffic management solutions, has raised $16 million in fifth-round funding. Quicksilver Ventures and W Capital co-led the deal, and were joined by return backers Selby Venture Partners, Needham Capital, Pacifica Fund, Glenbrook Capital, Crossbridge Partners and Franklin Park Investment Partners. Bay Microsystems has raised over $78 million in total VC funding since 1999.