What does the acronym OBFL stand for?

Question

Options

• AOnboard Failure Logging
• BOut of band Failure Logic
• COnboard Forwarding Logic
• DOversubscription Forwarding Level

• A
  90% (19)
• B
  5% (1)
• D
  5% (1)

Explanation

OBFL stands for Onboard Failure Logging (A), a diagnostic feature found on Cisco networking devices (particularly Catalyst switches and routers) that records critical system events, hardware failures, and crash information directly on the device's flash memory - allowing engineers to analyze failures even after a reload.

Why the distractors are wrong:

• B (Out of band Failure Logic) - "Out of band" refers to a separate management network path, which has no relation to OBFL's logging function.
• C (Onboard Forwarding Logic) - Forwarding logic describes how a device routes/switches packets, a completely separate concept from failure diagnostics.
• D (Oversubscription Forwarding Level) - Oversubscription is a capacity/bandwidth concept, unrelated to logging or failure tracking.

Memory tip: Focus on the L - OBFL is all about Logging. Think "the board logs its own failures" → Onboard Failure Logging. If you see "Onboard" in a Cisco context paired with diagnostics or crash data, OBFL is almost always the answer.

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