350-501 · Question #482
How does TI-LFA reduce packet loss in segment routing?
The correct answer is C. It calculates loop-free backup paths that are rapidly implemented in case of a link failure. TI-LFA (Topology Independent Loop-Free Alternate) reduces packet loss in segment routing by precomputing loop-free backup paths for each possible link or node failure. These backup paths are calculated using the network topology and are immediately implemented upon detection of…
Question
How does TI-LFA reduce packet loss in segment routing?
Options
- AIt enables path selection in SR-ТЕ to support MPLS label allocation.
- BIt establishes multiple labels per path using more than one IGP.
- CIt calculates loop-free backup paths that are rapidly implemented in case of a link failure.
- DIt determines which link to use when load balancing to prevent packet fragmentation loss.
How the community answered
(50 responses)- A2% (1)
- B2% (1)
- C92% (46)
- D4% (2)
Explanation
TI-LFA (Topology Independent Loop-Free Alternate) reduces packet loss in segment routing by precomputing loop-free backup paths for each possible link or node failure. These backup paths are calculated using the network topology and are immediately implemented upon detection of a failure. This ensures near-instantaneous traffic rerouting without requiring full reconvergence of the IGP, significantly minimizing packet loss during failures.
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