We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is Why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 606 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)


363 New Members signed up the last 30 days!


100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!

Tags: , ,

Forum Replies

  1. Hi Rene,

    If we have three path to destination and we configure variance to use the three path just like in your example here :-

    My question is :-
    The traffic will be shared in which way ? to be more clarify, In the begging of this article you said " if the feasible successor has a feasible distance which is 5 times worse than the successor then traffic will be shared in a 5:1 way " so what the rate will be if we have three path to destination ( the successor and tow feasible successors ) ?

  2. Hi Hussein,

    It will be shared in proportion based on the feasible distance. If the successor had a FD of 100 and the feasible successors had a FD of 20 and 10 then you’d see a 10:2:1 ratio.


  3. Thanks a lot…you the man…


  4. Hi guys,

    the FS normally is not inserted in the routing table, only the successor route can be found there.
    If you do unequal-cost LB, the FS routes will be put in the routing table, right?

    And if there are multiple FS in the EIGRP topology table, what is the deciding factor to choose one to replace the successor route in case it fails? The one with the lowest AD becomes the next successor?


  5. Hello Florain

    The FS is a FS only if it is not in the routing table. If it is in the routing table it has the best metric and is thus considered a successor, even if there are more than one such as is the case with EIGRP load balancing.

    If you do unequal cost LB, then the routes in the routing table are also considered successors and not feasable successors. But putting aside terminology, the answer is yes, the routes that were FS (at least the next one(s) in line) is inserted into the routing table and becomes a successor.

    The deciding factor of choosing the next successor is always the same, regardless of whether or not you are using load balancing. EIGRP will keep up to six feasible successors in the topology table and only the one (or ones) with the best metric (or metrics) become the successor(s) and are placed in the routing table.

    I hope this has been helpful!


47 more replies! Ask a question or join the discussion by visiting our Community Forum