What problem of RIP can be solved by the split horizon strategy or split horizon combined with poison reverse?
count-to-infinity problem
Poison Reverse is an implemented algorithm that is often used within distance-vector routing. The use of poison reverse is to solve the count-to-infinity problem (more about the count to infinity problem can be found in distance vector routing).
What is the difference between route poisoning and poison reverse?
Route poisoning is a method to prevent a router from sending packets through a route that has become invalid within computer networks. Unlike the split horizon with poison reverse, route poisoning provides for sending updates with unreachable hop counts immediately to all the nodes in the network.
What is hold down timer in RIP?
When the hold-down timer runs on RIP demand circuits, routes are advertised as unreachable on other interfaces. When the hold-down timer expires, the route is removed from the routing table if all destinations detect that the route is unreachable or the remaining destinations are down.
What is split horizon rule in RIP?
Split horizon is a method used by distance vector protocols to prevent network routing loops. When enabled, split horizon prevents a router from advertising a route back to the router from which it learned a route.
Why do we need poison reverse?
Poison reverse solves this problem by having router A send an update with a metric of 16 to both routers. This quickly informs routers B and C that the secondary paths have an infinite hop count and thus will cease forwarding packets to each other.
What is poison reverse in RIP?
In a computer network that uses the Routing Information Protocol (RIP) or other distance vector routing protocol, poison reverse is a loop avoidance process. Since RIP allows up to 15 hops to another gateway, setting the hop count to 16 would mean infinite. …
Why is a hold down timer used?
A function of a router that prevents a route from being updated for a specified length of time, in seconds. A hold down timer is often used to ensure sufficient time for all routers to be updated when a route fails.