Juniper® Lab Exercises Exam Notes : Ospf Configuration And Verification

8. OSPF Configuration and Verification

Description: The purpose of this lab is to configure OSPF on all the devices with an area of 100 and to verify the configuration using show commands of OSPF.

Network Diagram :

OSPF Configuration and Verification n/w diagram

Instructions:

1. Assign the IP address of all the devices as given below

Device Interface IP Address Mask
R1 So-0/0/0
So-0/0/1
192.168.3.1
192.168.1.1
255.255.255.0
255.255.255.0
R2 So-0/0/0
So-0/0/1
192.168.1.2
192.168.2.1
255.255.255.0
255.255.255.0
R3 So-0/0/0
So-0/0/1
192.168.3.2
192.168.2.2
255.255.255.0
255.255.255.0

2. Enable OSPF (use area number as 100) on all the interfaces of all the devices

3. Issue show ospf interface on R1

4. Issue show ospf neighbor on R1.

5. Issue show ospf database on R1.

On R1:

user@R1>configure
[edit]
user@R1#edit interfaces so-0/0/0 unit 0 family inet
[edit interfaces so-0/0/0 unit 0 family inet]
user@R1#set address 192.168.3.1/24
[edit interfaces so-0/0/0 unit 0 family inet]
user@R1#exit
[edit]
user@R1#edit interfaces so-0/0/1 unit 0 family inet
[edit interfaces so-0/0/1 unit 0 family inet]
user@R1#set address 192.168.1.1/24
[edit interfaces so-0/0/1 unit 0 family inet]
user@R1#exit
[edit]
user@R1#edit protocols ospf area 100 interface so-0/0/0
[edit protocols ospf area 100 interface so-0/0/0]
user@R1#exit
[edit]
user@R1#edit protocols ospf area 100 interface so-0/0/1
[edit protocols ospf area 100 interface so-0/0/1]
user@R1#exit
[edit]
user@R1#commit
commit complete
[edit]
user@R1#

On R2:

user@R2>configure
[edit]
user@R2#edit interfaces so-0/0/0 unit 0 family inet
[edit interfaces so-0/0/0 unit 0 family inet]
user@R2#set address 192.168.1.2/24
[edit interfaces so-0/0/0 unit 0 family inet]
user@R2#exit
[edit]
user@R2#edit interfaces so-0/0/1 unit 0 family inet
[edit interfaces so-0/0/1 unit 0 family inet]
user@R2#set address 192.168.2.1/24
[edit interfaces so-0/0/1 unit 0 family inet]
user@R2#
exit
[edit]
user@R2#edit protocols ospf area 100 interface so-0/0/0
[edit protocols ospf area 100 interface so-0/0/0]
user@R2#exit
[edit]
user@R2#edit protocols ospf area 100 interface so-0/0/1
[edit protocols ospf area 100 interface so-0/0/1]
user@R2#
exit
[edit]
user@R2#commit
commit complete
[edit]
user@R2#

On R3:

user@R3>configure
[edit]
user@R3#edit interfaces so-0/0/0 unit 0 family inet
[edit interfaces so-0/0/0 unit 0 family inet]
user@R3#
set address 192.168.3.2/24
[edit interfaces so-0/0/0 unit 0 family inet]
user@R3#exit
[edit]
user@R3#edit interfaces so-0/0/1 unit 0 family inet
[edit interfaces so-0/0/1 unit 0 family inet]
user@R3#set address 192.168.2.2/24
[edit interfaces so-0/0/1 unit 0 family inet]
user@R3#exit
[edit]
user@R3#edit protocols ospf area 100 interface so-0/0/0
[edit protocols ospf area 100 interface so-0/0/0]
user@R3#
exit
[edit]
user@R3#edit protocols ospf area 100 interface so-0/0/1
[edit protocols ospf area 100 interface so-0/0/1]
user@R3#
exit
[edit]
user@R3#commit
commit complete
[edit]
user@R3#

On R1:

user@R1>show ospf interface

Interface   State     Area            DR ID     BDR ID    Nbrs
so-0/0/1    PtToPt    0.0.0.100       0.0.0.0   0.0.0.0   1
so-0/0/0    PtToPt    0.0.0.100       0.0.0.0   0.0.0.0   1

user@R1>show ospf neighbor

Address           Interface   State  ID                Pri  Dead
192.168.3.2       so-0/0/0    Full   192.168.3.2       125  37

user@R1>show ospf database

OSPF link state database, Area 0.0.0.100
Type      ID                    Adv Rtr               Seq            Age   Opt   Cksum   Len
Router    *192.168.1.2          192.168.1.2           0x80000002     215   0x20  0xfeec  28

OSPF link state database, Area 0.0.0.0
Type      ID                    Adv Rtr               Seq            Age   Opt   Cksum   Len
Router    *192.168.2.1          192.168.2.1           0x80000002     215   0x20  0xfeec  28

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