In here R1 and R2 are connected via cable

e3 to e3 is 40.40.40.1/24
40.40.40.2/24

Goal is to that R1 will be able go to Loopback address of R2=2.2.2.2 via OSPF
And R2 be able to Ping Loopback of R1=1.1.1.1

Here I will give IP address to R1 em3 and Lo0

root@R1# set interfaces em3 unit 0 family inet address 40.40.40.1/24
root@R1# set interfaces lo0 unit 0 family inet address 1.1.1.1/24

Here are R1 Configuration

root@R1> show configuration

interfaces {
em3 {
unit 0 {
family inet {
address 40.40.40.1/24;
}

}

}
lo0 {
unit 0 {
family inet {
address 1.1.1.1/24;
}

}

}
}

Here I will give IP address to R2 em3 and Lo0

root@R2# set interfaces em3 unit 0 family inet address 40.40.40.2/24
root@R2# set interfaces lo0 unit 0 family inet address 2.2.2.2/24

root@R2# show interfaces
em3 {
unit 0 {
family inet {
address 40.40.40.2/24;
}

}

}
lo0 {
unit 0 {
family inet {
address 2.2.2.2/24;
}

}

}

Now seated at R1 I cannot ping Loopback address of R2=2.2.2.2 Why? Since Network 2.2.2.0 is not inside the routing table,