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Exam 300-620 topic 1 question 271 discussion

Actual exam question from Cisco's 300-620
Question #: 271
Topic #: 1
[All 300-620 Questions]

An endpoint called EP1 is connected to Cisco ACI compute leaf1. The engineer must replace EP1 with EP2 on the same leaf switch. Which set of actions forces all remote leaves to delete EP1 before timer expiration?

  • A. Set L2 Unknown Unicast to Hardware proxy.
    Select Clear remote MAC entries.
  • B. Set L2 Unknown Unicast to Flood.
    Select Clear remote MAC entries.
  • C. Set L2 Unknown Unicast to Hardware Proxy.
    Select Clear remote IP entries.
  • D. Set L2 Unknown Unicast to Flood.
    Select Clear remote IP entries.
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Suggested Answer: B 🗳️

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prospio971
2 months, 4 weeks ago
Selected Answer: A
By setting L2 Unknown Unicast to Hardware Proxy and clearing remote MAC entries, the fabric ensures that all references to EP1 are removed promptly, allowing EP2 to be properly learned and avoiding traffic misdirection. It is not B: Setting L2 Unknown Unicast to "Flood" would result in unnecessary flooding of unknown unicast traffic across the fabric, which is inefficient and not recommended in ACI environments.
upvoted 1 times
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ed27
8 months, 2 weeks ago
Selected Answer: B
B is correct
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mms101
8 months, 3 weeks ago
B. When the bridge domain has L2 Unknown Unicast set to Flood, if an endpoint is deleted the system deletes it from both the local leaf switches as well as the remote leaf switches where the bridge domain is deployed, by selecting Clear Remote MAC Entries. Without this feature, the remote leaf continues to have this endpoint learned until the timer expires. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/L2_config/b_Cisco_APIC_Layer_2_Configuration_Guide/b_Cisco_APIC_Layer_2_Configuration_Guide_chapter_010.html#:~:text=When%20the%20bridge,the%20timer%20expires.
upvoted 3 times
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