350-501 · Question #498
In MPLS traffic engineering, which FRR operation swaps the label and pushes the backup label?
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…
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
How the community answered
(22 responses)- A86% (19)
- B9% (2)
- C5% (1)
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.
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