... this timer the expiration timer, or timeout. Cisco's IOS calls it the invalid timer. The expiration timer is initialized to 180 seconds whenever a new route is established and is ... Study: Discontiguous Subnets Case Study: Manipulating RIP Metrics Troubleshooting RIP The oldest of the distance vector IP routing protocols still in widespread use, RIP currently exists in ... compatibility problems between implementations are rare. RIP was designed for smaller internetworks in which the data links are fairly homogeneous. Within these constraints, and especially within...