In this tutorial we are going to learn how to configure OSPF Clear-Text Authentication in cisco packet tracer.
OSPF clear text Authentication is very semilar to the MD5 authentication
If You Want To Learn How To Fully Configure OSPF MD5 Authentication by clicking this link you can learn how to configure OSPF MD5 Authentication
Firstly assign the ip address to the router and pc and
Ip Address configuration on R1:
Router>enable
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#ip add 1.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router(config-if)#exit
Router(config)#int f0/1
Router(config-if)#ip add 2.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
Router(config-if)#exit
Router(config)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
Ip Address configuration on R2:
Router>
Router>enable
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#ip add 2.0.0.2 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
exit
Router(config)#int f0/1
Router(config-if)#ip add 3.0.0.1 255.0.0.0
Router(config-if)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
exit
After assining the ip address to the routers and pc’s now we are doing ospf routing here.
OSPF Routing configuration on R1:
Router(config)#
Router(config)#router ospf 1
Router(config-router)#network 1.0.0.0 0.255.255.255 area 0
Router(config-router)#network 2.0.0.0 0.255.255.255 area 0
Router(config-router)#
OSPF Routing configuration on R2:
Router(config)#
Router(config)#router ospf 1
Router(config-router)#network 2.0.0.0 0.255.255.255 area 0
Router(config-router)#network 3.0.0.0 0.255.255.255 area 0
Router(config-router)#
After assining the ip address and routing now we have to configure OSPF Clear text Authentication
OSPF Clear Text Authentication on R1:
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/1
Router(config-if)#ip authentication-key ccnp123
Router(config-if)#ip ospf authentication
Router(config-if)#exit
OSPF Clear Text Authentication on R2:
Router(config)#
Router(config)#int f0/0
Router(config-if)#ip authentication-key ccnp123
Router(config-if)#ip ospf authentication
Router(config-if)#exit
Now how to check our OSPF clear text Authentication is done or not
Clear Text Authentication Is Successfully Done Or Not By Using This Command You Can See
How To Check On R1
Router#show ip ospf int f0/1
How To Check On R2
Router#show ip ospf int f0/0
This is all how to configure OSPF Clear Text Authentication with assining the ip addresss and OSPF routing
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