Step 4: Verify the OSPF Protocol Configuration

Purpose

After you have checked interfaces and neighbors, verify the OSPF protocol configuration.

Action

To verify the OSPF protocol configuration, enter the following command from the ingress, transit, and egress routers:

user@host> show configuration protocols ospf

Sample Output 1

user@R1> show configuration protocols ospf 

traffic-engineering;

area 0.0.0.0 {

    interface so-0/0/0.0;

    interface so-0/0/1.0;

    interface so-0/0/2.0;     <<< The loopback interface (lo0) is missing

}

Sample Output 2

user@R3> show configuration protocols ospf 

area 0.0.0.0 {                    <<< traffic engineering is missing

    interface so-0/0/0.0;

    interface so-0/0/1.0;

    interface so-0/0/2.0;

    interface so-0/0/3.0;    <<< The loopback interface (lo0) is missing

}

Sample Output 3

user@R6> show configuration protocols ospf 

traffic-engineering;

area 0.0.0.0 {

    interface so-0/0/0.0;

    interface so-0/0/1.0;

    interface so-0/0/2.0;

    interface so-0/0/3.0;    <<< The loopback interface (lo0) is missing

}

What It Means

All three sample outputs show that the loopback interface is not included on any of the routers. Including the loopback (lo0) interface is important when you have the RID manually configured.

In addition, Sample Output 2 from transit router R3 shows that traffic engineering is not configured. Traffic engineering must be manually enabled when you configure OSPF for an MPLS network.

Because the loopback interface and traffic engineering are missing from the OSPF protocol configuration, the LSP does not work as expected.