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Take Appropriate Action



Description: Depending on the error you encountered in your investigation, you must take the appropriate action to correct the problem. In this example, the loopback (lo0) interface is missing from all routers, and traffic engineering is missing from the transit router (R3).


To correct the errors in this example, follow these steps:

  1. Include the loopback (lo0) interface on all routers that have the RID manually configured. Enter the following configuration mode commands:

  2. Move up one level of the configuration hierarchy:

  3. Include traffic engineering on the transit router (R3). Enter the following configuration mode command:

  4. On all routers, verify and commit the configuration:

Sample Output


The sample output shows that the loopback (lo0) interface and traffic engineering are now correctly configured on transit router R3. When traffic engineering is configured, OSPF advertises the traffic engineering capabilities of the links.

In the OSPF configuration, you must manually include the loopback (lo0) interface and set it to passive when you manually configure an RID. Setting the loopback (lo0) interface to passive ensures that protocols are not run over the loopback (lo0) interface and the loopback (lo0) interface is advertised correctly throughout the network.. If you do not manually configure an RID, there is no need to explicitly include the loopback interface because the OSPF protocol automatically includes the loopback (lo0) interface.

For more information about configuring LSPs and MPLS, see the Junos MPLS Applications Configuration Guide.