350-501 Question #498: Real Exam Question with Answer & Explanation

The correct answer is A: Point of Local Repair. In MPLS Traffic Engineering (TE) with Fast Reroute (FRR), the Point of Local Repair (PLR) is the router where a failure is detected. The PLR immediately swaps the current label and pushes the backup label onto the packet stack to reroute traffic to a precomputed backup path. This

MPLS and Segment Routing

Question

In MPLS traffic engineering, which FRR operation swaps the label and pushes the backup label?

Options

APoint of Local Repair
BMid-Point
CBranch Point
DMerge Point

Explanation

In MPLS Traffic Engineering (TE) with Fast Reroute (FRR), the Point of Local Repair (PLR) is the router where a failure is detected. The PLR immediately swaps the current label and pushes the backup label onto the packet stack to reroute traffic to a precomputed backup path. This operation ensures near-instantaneous recovery from link or node failures by directing traffic to the backup path without waiting for IGP convergence.

Topics

#MPLS FRR#MPLS Traffic Engineering#Point of Local Repair

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