EIGRP Feasibility Condition

From: Herbert Maosa (asawilunda@googlemail.com)
Date: Mon Jan 07 2008 - 03:14:49 ARST


It could be very early in the morning and I probably am missing something
fundamental here. Look at the output below. Shouldn't the highlighted path
be excluded from the EIGRP topology table based on failing the feasibility
condition according to the current feasible distance ?

sh ip eigrp topo 222.22.2.0
IP-EIGRP (AS 1024): Topology entry for 222.22.2.0/24
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 30720
  Routing Descriptor Blocks:
  174.1.45.5 (FastEthernet0/1), from 174.1.45.5, Send flag is 0x0
      Composite metric is (30720/28160), Route is External
      Vector metric:
        Minimum bandwidth is 100000 Kbit
        Total delay is 200 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 1
      External data:
        Originating router is 150.1.5.5
        AS number of route is 0
        External protocol is RIP, external metric is 7
        Administrator tag is 0 (0x00000000)
 * 174.1.145.1 (Serial0/0/0), from 174.1.145.1, Send flag is 0x0
      Composite metric is (2684416/2172416), Route is External*
      Vector metric:
        Minimum bandwidth is 1544 Kbit
        Total delay is 40100 microseconds
        Reliability is 255/255
        Load is 1/255
        Minimum MTU is 1500
        Hop count is 2
      External data:
        Originating router is 150.1.5.5
        AS number of route is 0
        External protocol is RIP, external metric is 7
        Administrator tag is 0 (0x00000000)

Herbert.



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