The short discovery process runs in parallel with the full discovery process and has its own discovery queue and its own timer interval. Short discovery process shows how the short discovery process works.
IsDownOrFlapping interface attribute changes and OperationallyDown card events serve as input to the short discovery process. Periodically, the device node table is scanned for short discovery candidates, and any candidates that are found in the table are placed on the short discovery queue. The short discovery probes contact the candidates to update the dynamic indices of their interfaces and their cards for monitoring purposes.
Only the IsDownOrFlapping interface attribute changes pertain to IPSec tunnels and IPSec-enabled routers. The OperationallyDown card events pertain to cards that reside in switches.
