A bandwidth design should prefer one WAN until a configured usage threshold is exceeded, then place sessions on another eligible WAN. Which ECMP behavior matches that requirement?

Choose the single best answer.

A.Strict RPF.
B.Usage-based spillover.
C.Longest-prefix matching alone.
D.Static source-IP hashing alone.

Show the answer and explanation

✓ Correct answer

Usage-based spillover.

Usage-based spillover responds to a configured usage threshold. Prefix matching chooses destination scope, source hashing makes fixed-key assignments, and RPF checks source reachability; those do not implement the specified threshold behavior.

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