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Refer to the exhibit.
IP connectivity between the three routers is configured. OSPF adjacencies must be established.
1. Configure R1 and R2 Router IDs using the interface IP addresses from the link that is shared between them.
2. Configure the R2 links with a max value facing R1 and R3. R2 must become the DR. R1 and R3 links facing R2 must remain with the default OSPF configuration for DR election. Verify the configuration after clearing the OSPF process.
3. Using a host wildcard mask, configure all three routers to advertise their respective Loopback1 networks.
4. Configure the link between R1 and R3 to disable their ability to add other OSPF routers.
A. See the Explanation below.
Correct Answer: A
Explanation/Reference:
Answer as below configuration:
on R1
conf terminal
interface Loopback0
ip address 10.10.1.1 255.255.255.255
!i
nterface Loopback1
ip address 192.168.1.1 255.255.255.0
!i
nterface Ethernet0/0
no shut
ip address 10.10.12.1 255.255.255.0
ip ospf 1 area 0
duplex auto
!i
nterface Ethernet0/1
no shut
ip address 10.10.13.1 255.255.255.0
ip ospf 1 area 0
duplex auto
!
router ospf 1
router-id 10.10.12.1
network 10.10.1.1 0.0.0.0 area 0
network 192.168.1.0 0.0.0.255 area 0
!
copy run star
On R2
conf terminal
interface Loopback0
ip address 10.10.2.2 255.255.255.255
!i
nterface Loopback1
ip address 192.168.2.2 255.255.255.0
!i
nterface Ethernet0/0
no shut
ip address 10.10.12.2 255.255.255.0
ip ospf priority 255
ip ospf 1 area 0
duplex auto
!i
nterface Ethernet0/2
no shut
ip address 10.10.23.2 255.255.255.0
ip ospf priority 255
ip ospf 1 area 0
duplex auto
!
router ospf 1
network 10.10.2.2 0.0.0.0 area 0
network 192.168.2.0 0.0.0.255 area 0
!
copy runs start
———————–
On R3
conf ter
interface Loopback0
ip address 10.10.3.3 255.255.255.255
!i
nterface Loopback1
ip address 192.168.3.3 255.255.255.0
!i
nterface Ethernet0/1
no shut
ip address 10.10.13.3 255.255.255.0
ip ospf 1 area 0
duplex auto
!i
nterface Ethernet0/2
no shut
ip address 10.10.23.3 255.255.255.0
ip ospf 1 area 0
duplex auto
!
router ospf 1
network 10.10.3.3 0.0.0.0 area 0
network 192.168.3.0 0.0.0.255 area 0
!
copy run start
!
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