What is feasible distance and advertised distance in EIGRP?
The Advertised Distance (AD) is the distance from a given neighbor to the destination router. Feasible Distance. The Feasible Distance (FD) is the distance from the current router to the destination router.
What is the feasible successor?
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.
What is the advertised distance and feasible distance?
The advertised distance, your neighbor tells you how far it is for him to reach the destination and the feasible distance which is your total distance to get to the destination.
How do I check my neighbors EIGRP status?
In order to verify this, enter the debug eigrp packet hello command. As an alternative to the use of the debug command, you can ping IP address 224.0. 0.10 and verify whether that neighbor replies.
Why do we need a feasible successor for EIGRP?
EIGRP maintains redundant routes in memory so that if one fails, reverting to an backup route can occur instantaneously. A feasible successor is a backup route that can be used in the event of a topology change without having to recalculate routes.
When is a route entered as a feasible successor?
A route is entered into the EIGRP topology table as a feasible successor only if it meets the feasibility condition, which asserts that the reported distance of a route must be lower than the feasible distance of the current successor route. To better illustrate this concept, consider the following scenario.
When is a route entered into the EIGRP topology table?
A route is entered into the EIGRP topology table as a feasible successor only if it meets the feasibility condition, which asserts that the reported distance of a route must be lower than the feasible distance of the current successor route.
What is the advertised distance of an EIGRP router?
An EIGRP router advertises each destination it can reach as a route with an attached metric. This metric is called the route’s reported distance (the term advertised distance has also been used in older documentation).