Relationships between the MPLS and transport modelsthrough Relationships between the L3VPN, MPLS, and transport modelsdemonstrate how MPLS Managermodels (represents) the discovered MPLS and VPN topology. The underlying physical-transport objects in the model, shown as white text on black background, are managed by IP Availability Manager. As such, MPLS Managerreceives the status of these objects from IP Availability Manager.

Figure 1. Relationships between the MPLS and transport models
Figure 2. Relationships between the LDP-signaled L2VPN, MPLS, and transport models
Figure 3. Relationships between the BGP-signaled L2VPN, MPLS, and transport models
Figure 4. Relationships between the L3VPN, MPLS, and transport models

Not all of the underlying physical-transport objects that are understood by MPLS Managerare shown in Relationships between the MPLS and transport modelsthrough Relationships between the L3VPN, MPLS, and transport models. For example, MPLS Manageralso understands Cable and TrunkCable objects.

MPLS-IP cross-domain correlation requires the use of the Global Managerto complete the cross-domain impact analysis. The Global Managerexamines the problems and impacts from MPLS Managerand IP Availability Managerto learn the explanation chain, and then adds the MPLS impact as an impact of the underlying physical-transport problem.