Amit,
The BGP Backward Transition alarm for event code 0x220011 is generated from a trap. Specifically the bgpBackwardTransition defined in the BGP4-MIB as follows:
bgpBackwardTransition NOTIFICATION-TYPE
OBJECTS { bgpPeerLastError,
bgpPeerState }
STATUS deprecated
DESCRIPTION
"The bgpBackwardTransition event is generated
when the BGP FSM moves from a higher numbered
state to a lower numbered state.
This Notification has been replaced by the
bgpBackwardTransNotification Notification."
::= { bgpTraps 2 }
The LOST BGP PEERING SESSION alarm associated with the 0x220051 event is based on Spectrum proactively polling the bgpPeerTable for the status of the session. Reference the "BGP Peer Session Monitoring" section of the documentation.
BGP Peer Session Monitoring - CA Spectrum - 10.2 and 10.2.1 - CA Technologies Documentation
Joe