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Exam 350-501 topic 1 question 313 discussion

Actual exam question from Cisco's 350-501
Question #: 313
Topic #: 1
[All 350-501 Questions]

Which condition must be met for TI-LFA to protect LDP traffic?

  • A. For single-segment protection, the PQ node must be LDP and SR-capable.
  • B. The protected destination must have an associated LDP label and prefix-SID.
  • C. The point of local repair must be LDP-capable.
  • D. For double-segment protection, the P and Q nodes must be SR-capable.
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Suggested Answer: D 🗳️
by ja73 at Jan. 6, 2023, 3:13 p.m.

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joeneo
8 months, 3 weeks ago
Option D @ja73 is right
upvoted 1 times
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ja73
1 year, 4 months ago
Protecting LDP traffic with TI-LFA – Restrictions • Point of Local Repair (PLR) must be SR-capable • Protected destination must have an associated prefix-SID – Advertised by itself if SR-capable – Advertised by mapping server if not SR-capable • Single-segment protection: PQ node must be SR-capable – If not, use rLFA, which requires targeted LDP session • Double-segment protection: P and Q nodes must both be SR-capable Page 56 - https://www.cisco.com/c/dam/global/zh_cn/solutions/service-provider/segment-routing/pdf/topology_independent_lfa.pdf
upvoted 4 times
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