Building OSPF network with EVE-NG (1)

OSPF(Open Shortest Path First) is a link-state routing protocol. OSPF version 2 is for IPv4 and version 3 is for IPv6.

OSPF protocol is illustrated from RFC2328.

 

Why OSPF?

It is a standard protocol unlike EIGRP(Cisco). almost all network devices support OSPF for a routing protocol.

 

Why no OSPF?

OSPF could consume resources such as CPU and RAM but nowadays devices are high-performance so it is not a big deal.

 

 

*NOTIFICATION

ALL THESE SCENARIOS ARE ORIGINATED FROM "IP ROUTING - PETER JEON"

RIP, Great Peter Jeon. I remember you. I respect you.

 

 

<Basic OSPF underlay network>

I used IOL on eve-eg due to using Serial interface. eve-ng does not support serial interface for GNS3. IOL is better for a switch part than GNS3.

SW1     : i86bi-linux-l2-adventerprisek9-15.2d.bin

Routers : i86bi-linux-l3-adventerprisek9-15.5.2T.bin

Underlay Topology

<Basic OSPF logical network>

 

SW1 SW1(config)#vlan 123,24,34,45 SW1(config-vlan)#exit SW1(config)#int range e 0/0 - 3 , e 1/0 SW1(config-if-range)#switchport trunk encapsulation dot1q SW1(config-if-range)#switchport mode trunk

R1 R1(config)#int lo 0 R1(config-if)#ip add 1.1.1.1 255.255.255.0 R1(config-if)#int e 0/0 R1(config-if)#no shut R1(config-if)#int e 0/0.123 R1(config-subif)#encap dot 123 R1(config-subif)#ip add 1.1.123.1 255.255.255.0

R2 R2(config)#int lo 0 R2(config-if)#ip add 1.1.2.2 255.255.255.0 R2(config-if)#int e 0/0 R2(config-if)#no shut R2(config-if)#int e 0/0.123 R2(config-subif)#encap dot 123 R2(config-subif)#ip add 1.1.123.2 255.255.255.0 R2(config-if)#int e 0/0.24 R2(config-subif)#encap dot 24 R2(config-subif)#ip add 1.1.24.2 255.255.255.0

R3 R3(config)#int lo 0 R3(config-if)#ip add 1.1.3.3 255.255.255.0 R3(config-if)#int e 0/0 R3(config-if)#no shut R3(config-if)#int e 0/0.123 R3(config-subif)#encap dot 123 R3(config-subif)#ip add 1.1.123.3 255.255.255.0 R3(config-subif)#int s 1/1 R3(config-if)#ip add 1.1.34.3 255.255.255.0 R3(config-if)#no shut

R4 R4(config)#int lo 0 R4(config-if)#ip add 1.1.4.4 255.255.255.0 R4(config-if)#int e 0/0 R4(config-if)#no shut R4(config-if)#int e 0/0.24 R4(config-subif)#encap dot 24 R4(config-subif)#ip add 1.1.24.2 255.255.255.0 R4(config-subif)#int e 0/0.45 R4(config-subif)#encap dot 45 R4(config-subif)#ip add 1.1.45.2 255.255.255.0 R4(config-subif)#int s 1/2 R4(config-subif)#ip add 1.1.34.4 255.255.255.0 R4(config-subif)#no shut

R5 R5(config)#int lo 0 R5(config-if)#ip add 1.1.5.5 255.255.255.0 R5(config-if)#int e 0/0 R5(config-if)#no shut R5(config-if)#int e 0/0.45 R5(config-subif)#encap dot 45 R5(config-subif)#ip add 1.1.45.5 255.255.255.0

All devices has below basic commands en conf t hostname ~~~ no ip domain lookup enable secret cisco line console 0 logging synchronous exec-timeout 0 line vty 0 4 transport input telnet password cisco end

 

<Network connectivity Check>

R1#ping 1.1.123.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.123.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms R1#ping 1.1.123.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.123.3, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms R4#ping 1.1.24.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.24.2, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms R4#ping 1.1.34.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.34.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 9/9/10 ms R4#ping 1.1.45.5 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1.1.45.5, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms R4#

 

 

From here, the basic setup for OSPF routing.

Next, I will build OSPF routing on all.