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1. Juniper JNCIA
Juniper OSPF Route Configuration
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2. Juniper OSPF Route Configuration

3. Juniper OSPF Route Configuration
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

4. Juniper OSPF Route 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;
}
}
}
}

5. Juniper OSPF Route Configuration
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;
}
}
}

6. Juniper OSPF Route Configuration
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,
root@R1> show route
inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1.1.1.0/24 *[Direct/0] 00:12:59
> via lo0.0
1.1.1.1/32 *[Local/0] 00:12:59
Local via lo0.0
40.40.40.0/24 *[Direct/0] 00:12:59
> via em3.0
40.40.40.1/32 *[Local/0] 00:12:59
Local via em3.0

7. Juniper OSPF Route Configuration
As we see the network 2.2.2.0/24 is not inside the Routing table ; So I will configure it with OSPF on
both R1 and R2 .
Remember you need always advertise connected interface on the OSPF.
root@R1# set protocols ospf area 0.0.0.0 interface em3
root@R1# set protocols ospf area 0.0.0.0 interface lo0
Here is my show commands to check it:
root@R1# show protocols ospf
area 0.0.0.0 {
interface em3.0;
interface lo0.0;

8. Juniper OSPF Route Configuration
Now I will do same concept in R2, that is advertise each interface em3 and lo0 inside the OSPF
root@R2# set protocols ospf area 0.0.0.0 interface em3
root@R2# set protocols ospf area 0.0.0.0 interface lo0
root@R2# show protocols ospf
area 0.0.0.0 {
interface em3.0;
interface lo0.0;

9. Juniper OSPF Route Configuration
Now in same way that we use to see my neighbors I will be able to see my neighbors
root@R1> show ospf neighbor
Address Interface State ID Pri Dead
40.40.40.2 em3.0 Full 2.2.2.2 128 35
Here is my routing table on R1
root@R1> show route
inet.0: 7 destinations, 7 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10. Juniper OSPF Route Configuration
1.1.1.0/24 *[Direct/0] 00:30:07
> via lo0.0
1.1.1.1/32 *[Local/0] 00:30:07
Local via lo0.0
2.2.2.0/24 *[OSPF/10] 00:05:56, metric 1
> to 40.40.40.2 via em3.0
2.2.2.2/32 *[OSPF/10] 00:05:56, metric 1
> to 40.40.40.2 via em3.0
40.40.40.0/24 *[Direct/0] 00:30:07
> via em3.0
40.40.40.1/32 *[Local/0] 00:30:07
Local via em3.0
224.0.0.5/32 *[OSPF/10] 00:12:24, metric 1
MultiRecv

11. Juniper OSPF Route Configuration
Now since I see network 2.2.2.0/24 on my tables I can ping 2.2.2.2
root@R1> ping 2.2.2.2
PING 2.2.2.2 (2.2.2.2): 56 data bytes
64 bytes from 2.2.2.2: icmp_seq=0 ttl=64 time=0.557 ms
64 bytes from 2.2.2.2: icmp_seq=1 ttl=64 time=0.418 ms
64 bytes from 2.2.2.2: icmp_seq=2 ttl=64 time=0.372 ms
64 bytes from 2.2.2.2: icmp_seq=3 ttl=64 time=0.714 ms
^C

12. Juniper OSPF Route Configuration
Now lets check the routing table on R2, R2 should be able to see the loopback of R1=1.1.1.0
inside his routing table.
root@R2> show ospf neighbor
Address Interface State ID Pri Dead
40.40.40.1 em3.0 Full 1.1.1.1 128 34
root@R2> show route
inet.0: 7 destinations, 7 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

13. Juniper OSPF Route Configuration
1.1.1.0/24 *[OSPF/10] 00:04:04, metric 1
> to 40.40.40.1 via em3.0
1.1.1.1/32 *[OSPF/10] 00:04:04, metric 1
> to 40.40.40.1 via em3.0
2.2.2.0/24 *[Direct/0] 00:33:38
> via lo0.0
2.2.2.2/32 *[Local/0] 00:33:38
Local via lo0.0
40.40.40.0/24 *[Direct/0] 00:33:38
> via em3.0
40.40.40.2/32 *[Local/0] 00:33:38
Local via em3.0
224.0.0.5/32 *[OSPF/10] 00:08:29, metric 1
MultiRecv
Now since 1.1.1.0 is inside the table I should be able to ping 1.1.1.1 from R2

14. Juniper OSPF Route Configuration
1.1.1.0/24 *[OSPF/10] 00:04:04, metric 1
> to 40.40.40.1 via em3.0
1.1.1.1/32 *[OSPF/10] 00:04:04, metric 1
> to 40.40.40.1 via em3.0
2.2.2.0/24 *[Direct/0] 00:33:38
> via lo0.0
2.2.2.2/32 *[Local/0] 00:33:38
Local via lo0.0
40.40.40.0/24 *[Direct/0] 00:33:38
> via em3.0
40.40.40.2/32 *[Local/0] 00:33:38
Local via em3.0
224.0.0.5/32 *[OSPF/10] 00:08:29, metric 1
MultiRecv
Now since 1.1.1.0 is inside the table I should be able to ping 1.1.1.1 from R2

15. Juniper OSPF Route Configuration
root@R2> ping 1.1.1.1
PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=64 time=0.471 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.836 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=64 time=1.159 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=64 time=0.843 ms
So summary : make sure always advertise directkty connected inside the OPSF

16. Juniper OSPF Route Configuration
Here is R1#:
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;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface em3.0;
interface lo0.0;
}
}
}

17. Juniper OSPF Route Configuration
Here is R2 Configuration:
root@R2> show configuration
interfaces {
em3 {
unit 0 {
family inet {
address 40.40.40.2/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.2/24;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface em3.0;
interface lo0.0;
}
}
}

18. ASM EDUCATIONAL CENTER INC. (ASM)
WHERETRAINING,TECHNOLOGY&SERVICECONVERGE
WWW.ASMED.COM