MPLS topology overview

Introduction to MPLS topology

In addition to IGP links, the MPLS topology map displays all of the MPLS, RSVP, and LDP interfaces for routers that are natively managed by the NFM-P. The MPLS topology map relies on IGP connectivity to determine which two RSVP or LDP interfaces are linked together. Because an operationally up RSVP-LDP interface link may not be functional if the IGP link is operationally down, the MPLS topology map displays IGP links to identify this problem.

When RSVP, LDP, and IGP interfaces are configured on a network interface, the IGP link can be operationally down while the other two interfaces are operationally up. In this case, the IGP link is not displayed on the MPLS topology but the RSVP and LDP interfaces appear. Because the connectivity of RSVP and LDP links rely on the missing IGP link, the RSVP and LDP interfaces from router X and Y are not connected.

Note: The CPAM MPLS topology view does not show targeted LDP sessions because the NFM-P provides targeted-LDP management.

Checkpoints are not supported on MPLS.

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