Eigrp what is a successor

Total delay is microseconds, minimum bandwidth is Kbit. The minimum Bandwidth is kbit while the Total Delay is microseconds.

Therefore, this provides a total Metrics of , as computed below,. So what about the as shown above? This actually represents the metrics of R2, R3 and R4 towards the same prefix 5. This means that in order for R1 to reach 5. The below traceroutes are showing three paths to reach the destination prefix 5. Enter configuration commands, one per line.

R1 show ip eigrp topology sec 5. So i would expect the routes will be installed as the preferred path which we can verify from the EIGRP routing table.

So does this means that the higher the bandwidth along the path, it will be selected as the Successor? R1 show ip eigrp topology all-links. So here we go, we can see that there were two paths possible, via R3 which we already knew as the Successor. But the question is will the path via R4 will really be used if R3 fails? Advertise Distance of Potential F.

From R4, the Feasible distance is This value will be advertise to R1 as the reported distance. How can we test this in actual? R1 config-if shut. Successor -A successor route is the best route to a destination network. EIGRP uses the successor route to forward traffic to a destination.

This is the router which is stored in the routing table. A successor route is based on the advertised distance from the neighbor. A successor route is a least-cost route to the destination network.

Routers R2 and R3 both connect to the subnet R1 receives both updates and calulates the best route. The best path goes through R2, so R1 stores that route in the routing table. Router R1 also calculates the metric of the route through R3. The feasibility condition is met and router R1 stores that route in the topology table as a feasible successor route.

The route can be used immediately if the primary route fails. Skip to content. On WAN interfaces every 60 seconds.

Configuring RIPv2. A feasible successor is a backup route that can be used in the event of a topology change without having to recalculate routes. The feasible successor can be used instantly, which means convergence time is instantaneous. This does not mean that a link that is not a successor or a feasible successor cannot be used to reach a remote subnet; if the successor and feasible successor are unavailable, it can still be used - however, DUAL must again perform calculations to find the best route.

The idea is to get to the remote subnet attached to R4, This is done by selecting one of three possible next-hop routers, R1, R2, or R3. No delay configurations have been made. The link from R0 to its three next-hop routers are all at T1 speed, 1.

Since EIGRP uses bandwidth as a factor to influence metric, the link between R1 and R4 will be given the lowest metric, and therefore will be preferred. Observe the following output on R