Looking Ahead
BGP as a protocol presents some basic elements of routing that are flexible enough to allow total control from the administrator's perspective. The power of BGP lies in its attributes and its route-filtering techniques. Attributes are simply parameters that can be modified to affect the BGP decision process. Route filtering can be done on a prefix level or a path level. A combination of filtering and attribute manipulation can achieve the optimal routing behavior. Because traffic follows a road map laid out by routing updates, modifying the routing behavior will eventually modify the traffic trajectories. The next chapter provides a hands-on approach to understanding the basics of setting routing policies with BGP.
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access