Networking systems developer Bivio Networks just took in $15.8 million in a round led by Silver Creek Ventures and including new Japanese investors Itochu Techno-Solutions Corporation and Cross Technology Partners, as well as existing backers InterWest Partners, Storm Ventures, Venrock and Goldman Sachs. The Pleasanton, Calif.-based company builds systems through Linux that can be used for security, management or compliance purposes. It will use its new financing to expand sales overseas.