Multi-area OSPF lab using two different vendors Juniper and Cisco. This lab is a good example of how basic OSPF actions are taking on Juniper routers and in comparison Cisco routers.

OSPF (Open Shortest Path First) is a routing protocol for Internet Protocol (IP) networks. OSPF is a link-state protocol. OSPF uses a shorted path first algorithm in order to build and calculate the shortest path to all known destinations.The shortest path is calculated with the use of the Dijkstra algorithm.

Task 1:
Change the hostnames on both Juniper routers.

lab@Vmx>configure
Entering configuration mode

[edit]
lab@Vmx#set system host-name R1
lab@Vmx#commit and-quit
lab@R1>


lab@Vmx>configure
Entering configuration mode

[edit]
lab@Vmx#set system host-name R2
lab@Vmx#commit and-quit
lab@R2>

Task 2:
Change the host names on both Cisco routers.

Router>enable
Router#configure terminal
Router(config)#hostname R3
R3(config)#


Router>enable
Router#configure terminal
Router(config)#hostname R4
R4(config)#

Task 3:
Assign IP address to the Juniper routers.

lab@R1>configure
Entering configuration mode

[edit]
lab@R1#set interfaces ge-0/0/3 unit 0 family inet address 192.168.12.1/24
lab@R1#set interfaces ge-0/0/2 unit 0 family inet address 192.168.13.1/24
lab@R1#commit and-quit
lab@R1>


lab@R2>configure
Entering configuration mode

[edit]
lab@R2#set interfaces ge-0/0/3 unit 0 family inet address 192.168.12.2/24
lab@R1#set interfaces ge-0/0/2 unit 0 family inet address 192.168.24.2/24
lab@R2#commit and-quit
lab@R2>

Task 4:
Assign IP address to the Cisco routers.

R3#configure terminal
R3(config)#interface ethernet 0/0
R3(config-if)#ip address 192.168.13.3 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#interface loopback 0
R3(config-if)#ip address 3.3.3.3 255.255.255.255
R3(config-if)#no shutdown
R3(config-if)#exit



R4#configure terminal
R4(config)#interface ethernet 0/0
R4(config-if)#ip address 192.168.24.4 255.255.255.0
R4(config-if)#no shutdown
R4(config-if)#exit
R4(config)#interface loopback 0
R4(config-if)#ip address 4.4.4.4 255.255.255.255
R4(config-if)#no shutdown
R4(config-if)#exit

Task 5:
Configure OSPF on Juniper routers.

lab@R1>configure
Entering configuration mode

[edit]
lab@R1# set protocols ospf area 0.0.0.0 interface ge-0/0/0.3
lab@R1# set protocols ospf area 0.0.0.1 interface ge-0/0/0.2
lab@R1#commit and-quit


lab@R2>configure
Entering configuration mode

[edit]
lab@R2# set protocols ospf area 0.0.0.0 interface ge-0/0/0.3
lab@R2# set protocols ospf area 0.0.0.1 interface ge-0/0/0.2
lab@R1#commit and-quit

Task 6:
Configure OSPF on Cisco routers.

R3#configure terminal
R3(config)#router ospf 1
R3(config-router)#network 192.168.13.0 0.0.0.255 area 1
R3(config-router)#network 3.3.3.3 0.0.0.0 area 1
R3(config-router)#end
R3#



R4#configure terminal
R4(config)#router ospf 1
R4(config-router)#network 192.168.13.0 0.0.0.255 area 2
R4(config-router)#network 4.4.4.4 0.0.0.0 area 2
R4(config-router)#end
R4#

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