As shown in MPLS Manager discovery, MPLS Manager is split into three components, known as the MPLS Topology Server, the MPLS Monitoring Server, and the MPLS Analysis Server. As their names suggest, one component discovers the MPLS and VPN topology, one component monitors the topology for status updates, and one component analyzes the status updates to diagnose MPLS and VPN impacts. The MPLS Topology Server works with IP Availability Manager to discover the logical and physical objects in the physical-transport domain, the MPLS domain, and the VPN domain.

Figure 1. MPLS Manager discovery

Data transfer between components in an MPLS Manager deployment presents another view of the interoperability between the components in an MPLS Manager deployment. Network Protocol Manager for BGP is included in the deployment only if the MPLS-BGP cross-domain correlation feature is enabled.

Figure 2. Data transfer between components in an MPLS Manager deployment

As shown in Figure 6, MPLS Manager imports the same BGP-enabled topology from IP Availability Manager that Network Protocol Manager for BGP imports. The two Managers perform BGP discovery independently. MPLS Manager monitors the discovered BGP topology by subscribing to BGP status updates in Network Protocol Manager for BGP.