6.3.7 Packet Tracer – Configure OSPF Authentication Answers

6.3.7 Packet Tracer – Configure OSPF Authentication (Answeers Version)

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6.3.7 Packet Tracer - Configure OSPF Authentication

6.3.7 Packet Tracer – Configure OSPF Authentication

Addressing Table

Device Interface IP Address Subnet Mask Default Gateway Switch Port
R1 G0/0/0 10.1.1.1 255.255.255.252 N/A N/A
G0/0/1 192.168.1.1 255.255.255.0 N/A S1F0/5
R2 G0/0/0 10.1.1.2 255.255.255.252 N/A N/A
G0/0/1 10.2.2.2 255.255.255.252 N/A N/A
R3 G0/0/0 10.2.2.1 255.255.255.252 N/A N/A
G0/0/1 192.168.3.1 255.255.255.0 N/A S3F0/5
PC-A NIC 192.168.1.5 255.255.255.0 192.168.1.1 S1F0/6
PC-B NIC 192.168.1.6 255.255.255.0 192.168.1.1 S2F0/18
PC-C NIC 192.168.3.5 255.255.255.0 192.168.3.1 S3F0/18

Objectives

– Configure OSPF MD5 authentication.

Background / Scenario

In this activity, you will configure OSPF MD5 authentication for secure routing updates.

Instructions

Part 1: Configure OSPF MD5 Authentication

Step 1: Test connectivity. All devices should be able to ping all other IP addresses.
Step 2: Configure OSPF MD5 authentication for all the routers in area 0.

Configure OSPF MD5 authentication for all the routers in area 0.

R1(config)# router ospf 1

R1(config-router)# area 0 authentication message-digest
R2(config)# router ospf 1

R2(config-router)# area 0 authentication message-digest
R3(config)# router ospf 1

R3(config-router)# area 0 authentication message-digest
Step 3: Configure the MD5 key for all the routers in area 0.

Configure an MD5 key on the GigabitEthernet interfaces on R1, R2 and R3. Use the password MD5pa55 for key 1.

R1(config)# interface g0/0/0

R1(config-if)# ip ospf message-digest-key 1 md5 MD5pa55
R2(config)# interface g0/0/0

R2(config-if)# ip ospf message-digest-key 1 md5 MD5pa55

R2(config-if)# interface g0/0/1

R2(config-if)# ip ospf message-digest-key 1 md5 MD5pa55
R3(config)# interface g0/0/1

R3(config-if)# ip ospf message-digest-key 1 md5 MD5pa55
Step 4: Verify configurations.

a. Verify the MD5 authentication configurations using the commands show ip ospf interface.

b. Verify end-to-end connectivity.

Answers Script

Router R1

conf t

interface g0/0/0

 ip ospf message-digest-key 1 md5 MD5pa55

router ospf 1

 area 0 authentication message-digest

end

Router R2

conf t

interface g0/0/0

 ip ospf message-digest-key 1 md5 MD5pa55

interface g0/0/1

 ip ospf message-digest-key 1 md5 MD5pa55

router ospf 1

 area 0 authentication message-digest

end

Router R3

conf t

interface g0/0/0

 ip ospf message-digest-key 1 md5 MD5pa55

router ospf 1

 area 0 authentication message-digest

end

Download 6.3.7 Packet Tracer – Configure and Verify NTP PDF & PKA files:


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