EIGRP Topology table Successor & Feasible Successor

Hi All,

Was doing a EIGRP lab & came across following observation in the EIGRP
topologu table.

as per the output there are two paths to 155.1.79.0 255.255.255.0,

But my problem is FD is 2816 via 155.1.67.7, second route via 155.1.146.1 is
having a AD of 3072, But as per my undestanding if the AD of the feasible
successor is > the FD successor it can not be there in the topology table,
Pls correct me if I am wrong.

sh ip eigrp topo 155.1.79.0 255.255.255.0

IP-EIGRP (AS 100): Topology entry for 155.1.79.0/24
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2816
  Routing Descriptor Blocks:
  155.1.67.7 (FastEthernet0/0.67), from 155.1.67.7, Send flag is 0x0
      Composite metric is (2816/256), Route is Internal
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 110 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
  155.1.146.1 (FastEthernet0/0.146), from 155.1.146.1, Send flag is 0x0
      Composite metric is (5632/3072), Route is Internal
      Vector metric:
        Minimum bandwidth is 2048 Kbit
        Total delay is 220 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 3

Thanks

Sara

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Received on Sun Jul 18 2010 - 02:21:22 ART