BGP Session Detector
The BGPSessionDetector checks if a BGP Session to a peering partner (peer-ip) is configured.
A BGP peering session is detected when a bgpPeerEntry from the RFC1269 MIB (.1.3.6.1.2.1.15.3.1
) exists and can be queried using SNMP.
The configured BGP peer session is detected when the return value is in the valid range of 1 (idle) to 6 (established).