400-007 · Question #365
As more links are added to the network, information and attributes related to the link is added to the control plane meaning every link that gets added will slow down the convergence of the control…
The correct answer is C. overlapping outages. MTTR (Mean Time To Repair/Recovery) measures how long it takes to restore a failed component. When MTTR increases, the network spends more cumulative time in a degraded state after any given failure. The longer a failure remains unresolved, the greater the probability that a…
Question
As more links are added to the network, information and attributes related to the link is added to the control plane meaning every link that gets added will slow down the convergence of the control plane by some measurable amount of time. As a result when additional redundancy is built or added the MTTR will increase too. Which risk increases along with the increased MTTR?
Options
- Amanagement visibility
- Bslower data plane convergence
- Coverlapping outages
- Dtopology change detection
How the community answered
(19 responses)- A11% (2)
- B5% (1)
- C84% (16)
Explanation
MTTR (Mean Time To Repair/Recovery) measures how long it takes to restore a failed component. When MTTR increases, the network spends more cumulative time in a degraded state after any given failure. The longer a failure remains unresolved, the greater the probability that a second independent failure occurs before the first is fixed - this is an overlapping outage. Overlapping outages are particularly dangerous because they can overwhelm redundancy, turning what would be a tolerable single-link failure into a full or partial outage. Management visibility (A) and topology change detection (D) relate to awareness, not directly to repair time risk. Slower data plane convergence (B) is a separate concern related to routing protocol behavior, not MTTR.
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