CONVERGENCE PROBLEMS
RIP updates described so far are quite simple. However, this simplicity can cause some problems. One problem is the possibility of sending traffic through an inefficient path; the other is the possibility of a routing update taking a long time to reach convergence, during which the routing domain is unstable and not passing traffic efficiently and perhaps incorrectly.
To see why, we assume in Figure 5-6 that there is a failure on network 1 between host 1 (H1) and router 1 (R1). In prior advertisements, R1 informed R2 and R3 that it was the next node to get to H1. Therefore, when R1 advertises infinity (16) metric to these routers, they should be able to know that they cannot reach H1. However, if either R2 or R3 send an update ...
Get IP Routing Protocols now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
