Well, multihoming concept is quiet clear, it used in case of providing redundancy using multiple isp links. But wat i am not clear is with using either STATIC ROUTES or IGP or BGP with it. wat is the advantage of using BGP over IGP for multihoming. Books say tht IGP chooses sub-optimal path. i didnt get how it will get suboptimal path? The route with higher priority is normally active, other is down. When primary goes down, secondary is marked active. and when again primary comes up, it switches to primary. now how will BGP outperform this IGP or static routing method of providing multihoming? How does it choose sub-optimal path ?
18 years ago