when EIGRP receives multiple paths to the same destination with the same prefix it adds these routes to its table and bases a best path decision upon the metrics in these updates. EIGRP determines closeness (lowest metric) as the winner and then installs the lowest metric/best path in its routing table.
THIS is the successor...
the default is four equal cost paths for determination, but this can be adjusted to include more or less paths... equal is a relative term and allowances can be determined using variance (to establish near equality)
a feasible successor is a path determined close, but not best after the calculation... this so called backup neighbor may be placed in the topology table and utilized in the event of successor failure
bandwidth and delay are EIGRP's default calculators... load, reliability and MTU can also be considered... see below...
r2620_01#sh int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 000f.2394.6c40 (bia 000f.2394.6c40)
Internet address is 192.168.1.50/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
network cisco ccna gns3 certification arteq
a network runs through it
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