The Border Gateway Protocol (BGP) facilitates the process of transferring the data over the internet. BGP traces all the possible paths that data can take to reach its destination and chooses the best path to make data transfer efficiently.
In simple words, BGP decides the shortest path between any two routers, between which there occurs a data exchange.
When traps are sent to OpManager , it uses the parser rule to determine whether the trap is a BGP trap. If the trap happens to be a BGP trap, then OpManager monitors the status and generates an alert - as up/down. The combination of an up and a down indication constitutes a Flap and OpManager monitors Flaps as well.
When the Flap count exceeds 5 within a span of 30 minutes (which is the default threshold specified), a Critical alert is raised. On further monitoring, if the Flap count falls below 5, then the alarm will be automatically cleared as it attains Rearm.
The entire functioning of how OpManager processes a BGP trap is depicted in the flow diagram below.
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