Description

Need to build a network with MPLS + RSVP + unnumbered interface.

Symptoms

The link shows as Down. 

Check if unnumbered interface is used. If yes, then this is the expected behavior. 

alt

Solution

If a topology requires configuring unnumbered interfaces, ensure the following configuration is committed:

set protocols ospf traffic-engineering advertise-unnumbered-interfaces
 

Once this is configured and committed, the links will come up.

For more details, refer to the technical documentation on traffic-engineering (OSPF) .