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 a

MPLS and Segment Routing

Question

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)

A
2% (1)
B
2% (1)
C
92% (46)
D
4% (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.

Topics

#TI-LFA#Segment Routing#Fast Reroute#Network Protection

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