|  | 12.5 | Challenge Labs
| 12.5.3 | Preventing routing loops
| Lab Activity
| In the previous challenge lab, you saw how long it took to converge when a link went down. In this lab, your task is to find out how to prevent and control routing loops. The use of hold-down timers, defining a maximum hop count, counting to infinity, poison reverse and split-horizon are all methods of controlling routing loops. You will use the RIP hop count metric to control routing loops in this lab.