We should change cost value in both routers: OSPF_peer_1 and OSPF_peer_2 to 50. To do this,
we need to add a following interface:
[admin@OSPF_peer_1] routing ospf interface> add interface=backup cost=50
[admin@OSPF_peer_1] routing ospf interface> print
0 interface=backup cost=50 priority=1 authentication-key=""
retransmit-interval=5s transmit-delay=1s hello-interval=10s
dead-interval=40s
[admin@OSPF_peer_2] routing ospf interface> add interface=to_peer_1 cost=50
[admin@OSPF_peer_2] routing ospf interface> print
0 interface=to_peer_1 cost=50 priority=1 authentication-key=""
retransmit-interval=5s transmit-delay=1s hello-interval=10s
dead-interval=40s
After changing the cost settings, we have only one equal cost multipath route left - to the network
10.3.0.0/24 from OSPF_MAIN router.
Routes on OSPF_MAIN router:
[admin@OSPF_MAIN] ip route> print
Flags: X - disabled, I - invalid, D - dynamic, J - rejected,
C - connect, S - static, r - rip, o - ospf, b - bgp
# DST-ADDRESS G GATEWAY DISTANCE INTERFACE
0 Io 192.168.0.0/24 110
1 DC 192.168.0.0/24 r 0.0.0.0 0 main_gw
2 Do 10.3.0.0/24 r 10.2.0.1 110 to_peer_2
r 10.1.0.1 to_peer_1
3 Io 10.2.0.0/24 110
4 DC 10.2.0.0/24 r 0.0.0.0 0 to_peer_2
5 Io 10.1.0.0/24 110
6 DC 10.1.0.0/24 r 0.0.0.0 0 to_peer_1
On OSPF_peer_1:
[admin@OSPF_peer_1] > ip route pr
Flags: X - disabled, I - invalid, D - dynamic, J - rejected,
Page 119 of 695
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