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Forum Replies

  1. Thank you so much for this clear explanation

  2. Hi Francesco,

    EIGRP will store all the possible paths in its topology table, between the brackets it stores the FD (feasible distance) and AD (advertised distance). For example:

    (156160/128256)

    156160 = feasible distance
    128256 = advertised distance

    Sometimes they use “computed distance” to refer to feasible distance and “reported” distance to refer to the advertised distance.

    In the topology table you will find at least 1 successor and possible some feasible successors. To become a feasible successor, its AD has to be lower than the FD of the successor.

    Hope this helps!

    Rene

  3. Hi Rene,

    How does EIGRP come up with the local metric for the interface it’s using to reach the destination network? And where can we see it. Thank you

  4. Hi Victor,

    EIGRP uses this formula to calculate the metric:

    https://networklessons.com/eigrp/eigrp-k-values-formula/

    Here is an example of a directly connected gigabit interface with a network that is advertised in EIGRP:

    R1#show ip eigrp topology 192.168.12.0/24
    EIGRP-IPv4 Topology Entry for AS(1)/ID(11.11.11.11) for 192.168.12.0/24
      State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2816
      Descriptor Blocks:
      0.0.0.0 (GigabitEthernet0/1), from Connected, Send flag is 0x0
          Composite metric is (2816/0), route is Internal
          Vector metric
    ... Continue reading in our forum

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