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Exam 300-620 topic 1 question 176 discussion

Actual exam question from Cisco's 300-620
Question #: 176
Topic #: 1
[All 300-620 Questions]



Refer to the exhibit. How are the STP BPDUs forwarded over Cisco ACI fabric?

  • A. Cisco ACI acts as the STP root for all three external switches.
  • B. STP BPDUs that are generated by Switch2 are received by Switch1 and Switch3.
  • C. STP BPDUs that are generated by Switch1 are received only by Switch3.
  • D. Cisco ACI fabric drops all STP BPDUs that are generated by the external switches.
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Suggested Answer: C 🗳️
by frzzt at March 16, 2023, 12:04 p.m.

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frzzt
Highly Voted 1 year, 1 month ago
Selected Answer: C
Trick questions. Answer is C. LEAF2 VLAN 10 is from other domain and other vlan pool, so BPDU's from SW1 are not flooded to SW2, only to SW3.
upvoted 6 times
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hebdeb
Most Recent 9 months, 4 weeks ago
Selected Answer: C
ACI floods STP Bridge Protocol Data Units (BPDUs) to the VXLAN network identifier (VNID) assigned to the FD VLAN (VNID is assigned through the VLAN pool so encapsulation has to be part of same VLAN pool to be in part of same STP domain). https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/application-policy-infrastructure-controller-apic/211236-ACI-operation-with-L2-switches-and-Spann.html
upvoted 4 times
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