The linked video demonstrates RIPng, our first dynamic routing protocol for IPv6. This is a simple but inefficient routing protocol. The metric is based on number of router hops, with no provision for differentiating between links with drastically different bandwidth (a frame-relay hop has the same cost as a 10-gig-ethernet in RIPng). Each router multicasts its entire routing protocol out each interface every 30 seconds, which wastes router CPU. RIPng routinely takes minutes to reroute around network failures.<div>RIPng does have the refinements added in RIPv2. For example, it multicasts its route updates. It is also capable of including tags in the route updates.<br /><div>The big advantage of RIPng is that it is simple to understand. But in production that is not good enough. RIPng is a perfect protocol for a computer science student to implement as a class project due to its simplicity, but having the PBX unreachable for 3-5 minutes while routing reconverges is unacceptable in a business environment.</div></div>
