Associating BGP
sessions with MPLS L3VPNs
During the postprocessing phase of discovery, the
MPLS Topology Server
creates an “UnderlyingVPN” relationship
between
the discovered BGP services/ BGP protocol endpoints/
BGP sessions
and
the VPNs that are discovered during L3VPN discovery:
- BGPService --> UnderlyingVPN --> VPN
- BGPProtocolEndpoint --> Underlying --> VPN
- BGPSession --> UnderlyingVPN --> VPN
- The UnderlyingVPN relationship is what makes MPLS-BGP cross-domain correlation possible. It enables theMPLS Topology Serverto generate VPN-impacted events for underlying BGP sessions that are impacted by BGP failures, misconfigurations, or manually disabled BGP protocol endpoints.