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Exam JN0-664 topic 1 question 52 discussion

Actual exam question from Juniper's JN0-664
Question #: 52
Topic #: 1
[All JN0-664 Questions]

Click the Exhibit button.

Referring to the exhibit, a working L3VPN exists that connects VPN-A sites. CoS is configured correctly to match on the MPLS EXP bits of the LSP. but when traffic is sent from Site-1 to Site-2. PE-2 is not classifying the traffic correctly.
What should you do to solve the problem?

  • A. Configure VPN prefix mapping for the PE-1_to_PE-2 LSP.
  • B. Set a static CoS value for the PE-1_to_PE-2 LSP.
  • C. Configure the explicit-null statement on PE-2.
  • D. Configure the explicit-null statement on PE-1.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by StargateCommand at Jan. 25, 2024, 7:49 p.m.

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fukJUNIPER
2 months, 3 weeks ago
Selected Answer: C
The QoS is on the label and the second-to-last router on the LSP should keep the label on instead of having it arrived popped
upvoted 1 times
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antigel8
3 months, 1 week ago
Selected Answer: C
Ultimate Hop Popping (UHP) must be configured on the egress LSR to keep the EXP bit along the LSP. So configuration is needed on PE-2 in this case.
upvoted 4 times
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[Removed]
3 months, 4 weeks ago
Selected Answer: C
C is correct
upvoted 2 times
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StargateCommand
5 months, 3 weeks ago
Selected Answer: C
Explicit-null should be configured on PE-2
upvoted 4 times
...
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