Free CCNA Lab Troubleshooting OSPF






In this free CCNA lab, you will troubleshoot an OSPF configuration.  The routers and PCs have already been loaded running configuration. These configurations contain errors that will prevent end-to-end communication across the network. You will need to troubleshoot each router to determine the configuration errors, and then use the appropriate commands to correct the configurations. When you have corrected all of the configuration errors, all of the hosts on the network should be able to communicate with each other.

The network should also have the following requirements met:

  • OSPF routing is configured on the BR1 router.
  • OSPF routing is configured on the BR2 router.
  • OSPF routing is configured on the HQ router.
  • OSPF updates must be disabled on the LAN and Loopback interfaces.
  • The HQ router must redistribute the default route to the Loopback interface in the routing updates.
  • All OSPF routers must use a process ID of 1.
  • All OSPF routers must be in area 0.

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Learning Objectives:

Upon completion of this lab, you will be able to:

  • Discover where communication is not possible.
  • Gather information about the misconfigured portion of the network along with any other errors.
  • Analyze information to determine why communication is not possible.
  • Propose solutions to network errors.
  • Implement solutions to network errors.
  • Document the corrected network.

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3 Responses to “Free CCNA Lab Troubleshooting OSPF”

  1. sbentim says:

    Does anyone have the solution for this lab?

  2. Connor says:

    This is the Solution

    Do no shut down on Serial 0/0/1 on router router 3

    On router 3, Do add a network 10.10.7.0 0.0.0.255 area 0. This adds the PC3 to the OSPF routing table

    On router 2 change the fa0/0 Ip address to 10.10.3.1 255.255.252.0

    Change the default gateway on PC3 to 10.10.3.1

    Thats it I think

  3. mehdidooche says:

    HQ#sh ip int brief
    Interface IP-Address OK? Method Status Protocol

    FastEthernet0/0 10.10.10.1 YES manual up up

    FastEthernet0/1 unassigned YES unset administratively down down

    Serial0/0/0 172.16.7.1 YES manual up up

    Serial0/0/1 172.16.7.5 YES manual down down

    Loopback1 209.165.202.129 YES manual up up

    Vlan1 unassigned YES unset administratively down down

    HQ(config)#interface fastEthernet 0/0
    HQ(config-if)#ip add
    HQ(config-if)#ip address 10.10.0.1 255.255.252.0
    HQ(config-if)#no shutdown
    HQ(config-if)#end

    Branch2(config)#interface s0/0/1
    Branch2(config-if)#ip add
    Branch2(config-if)#ip address 172.16.7.6 255.255.255.252
    Branch2(config-if)#end

    HQ(config)#router ospf 1
    HQ(config-router)#def
    HQ(config-router)#default-information originate
    HQ(config-router)#end

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