Guys,

While making the setup, i noticed the routing loop, may i know the reason
why ? please help

Rack1R5#trace 150.1.6.6

Type escape sequence to abort.
Tracing the route to 150.1.6.6

  1 155.1.0.3 16 msec 20 msec 20 msec
  2 155.1.37.7 20 msec 20 msec 20 msec
  3 155.1.37.3 20 msec 20 msec 20 msec
  4 155.1.37.7 20 msec 24 msec 20 msec
  5 155.1.37.3 20 msec 20 msec 16 msec
  6 155.1.37.7 20 msec 20 msec 20 msec
  7 155.1.37.3 20 msec 20 msec 20 msec
  8 155.1.37.7 20 msec 20 msec 20 msec
  9 155.1.37.3 20 msec 20 msec 20 msec
 10 155.1.37.7 20 msec 20 msec 20 msec
 11 155.1.37.3 16 msec 20 msec 16 msec
 12 155.1.37.7 20 msec 20 msec 20 msec
 13 155.1.37.3 20 msec 20 msec 20 msec
 14 155.1.37.7 20 msec 24 msec 20 msec
 15 155.1.37.3 16 msec 20 msec 20 msec
 16 155.1.37.7 20 msec 20 msec 20 msec
 17 155.1.37.3 20 msec 20 msec 20 msec
 18 155.1.37.7 20 msec 20 msec 20 msec
 19 155.1.37.3 20 msec 16 msec 20 msec
 20 155.1.37.7 20 msec 20 msec 20 msec

Rack1R3(config-router)#do sh ip route 150.1.6.6
Routing entry for 150.1.6.0/24
  Known via "bgp 100", distance 200, metric 0, type internal
  Redistributing via eigrp 100
  Advertised by eigrp 100 metric 1500 1 255 1 1500
  Last update from 155.1.146.6 00:18:27 ago
  Routing Descriptor Blocks:
  * 155.1.146.6, from 155.1.13.1, 00:18:27 ago
      Route metric is 0, traffic share count is 1
      AS Hops 0
      MPLS label: none
Rack1R3(config-router)#
Rack1R3(config-router)#do sh ip cef
Prefix               Next Hop             Interface
0.0.0.0/0            no route
0.0.0.0/8            drop
0.0.0.0/32           receive
127.0.0.0/8          drop
150.1.0.0/16         155.1.37.7           Ethernet0/0
150.1.3.0/24         attached             Loopback0
150.1.3.0/32         receive              Loopback0
150.1.3.3/32         receive              Loopback0
150.1.3.255/32       receive              Loopback0
150.1.6.0/24         155.1.37.7           Ethernet0/0
155.1.0.0/16         155.1.37.7           Ethernet0/0
155.1.0.0/24         attached             Serial1/0.1
155.1.0.0/32         receive              Serial1/0.1
155.1.0.3/32         receive              Serial1/0.1
155.1.0.255/32       receive              Serial1/0.1
155.1.5.0/24         155.1.0.5            Serial1/0.1
155.1.7.0/24         155.1.37.7           Ethernet0/0
155.1.8.0/24         155.1.0.5            Serial1/0.1
155.1.9.0/24         155.1.37.7           Ethernet0/0
155.1.10.0/24        155.1.0.5            Serial1/0.1
155.1.13.0/24        attached             Serial1/2
155.1.13.0/32        receive              Serial1/2

Rack1R3(config-router)#do sh ip cef 150.1.6.0
150.1.6.0/24
  nexthop 155.1.37.7 Ethernet0/0

do i need to clear the fib for making successful communication ?

Regards,
Venkee
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