Eric Mangini has strong ties to San Francisco 49ers management and coaches dating back at least 15 years.The thought of the 49ers consulting with him has obvious appeal given those connections and given Mangini's background as a defensive coordinator in particular.Mangini, now an NFL analyst for ESPN, is reportedly among multiple football people the 49ers have considered adding as a consultant. I don't know the extent of communications between Mangini and the team, but the subject raises a few thoughts in general:Open to ideas: The 49ers are coming off a Super Bowl appearance.