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300-620 · Question #218

Refer to the exhibit. A Cisco APIC raises this fault when connectivity for EPG-3 is configured. Which action clears the fault?

The correct answer is D. Create BD-3 for EPG-3. A Cisco ACI EPG requires an associated Bridge Domain to define its Layer 2 forwarding and enable network connectivity, so a fault during EPG connectivity configuration often indicates a missing or unlinked Bridge Domain.

ACI Management and Operations

Question

Refer to the exhibit. A Cisco APIC raises this fault when connectivity for EPG-3 is configured. Which action clears the fault?

Options

  • AAssociate BD-3 to VRF-1.
  • BImplement a domain for EPG-3.
  • CConfigure a subnet on BD-3.
  • DCreate BD-3 for EPG-3.

How the community answered

(50 responses)
  • A
    4% (2)
  • B
    8% (4)
  • C
    12% (6)
  • D
    76% (38)

Why each option

A Cisco ACI EPG requires an associated Bridge Domain to define its Layer 2 forwarding and enable network connectivity, so a fault during EPG connectivity configuration often indicates a missing or unlinked Bridge Domain.

AAssociate BD-3 to VRF-1.

While a Bridge Domain needs a VRF association, the primary fault for EPG connectivity (if the BD itself is missing or unlinked) is not resolved by merely associating a non-existent or unlinked BD to a VRF.

BImplement a domain for EPG-3.

Implementing a domain for EPG-3 is crucial for deployment but typically comes after the EPG-to-BD association is established.

CConfigure a subnet on BD-3.

Configuring a subnet on BD-3 is for IP routing within the Bridge Domain, but the EPG's basic connectivity fault usually precedes issues with IP addressing if the BD is missing or unlinked.

DCreate BD-3 for EPG-3.Correct

Every End-Point Group (EPG) in Cisco ACI requires an association with a Bridge Domain (BD) to define its Layer 2 forwarding characteristics and provide network connectivity. A fault during EPG-3 configuration for connectivity typically means that BD-3, which EPG-3 depends upon, has not yet been created or correctly linked.

Concept tested: Cisco ACI EPG-to-Bridge Domain dependency

Source: https://www.cisco.com/c/en/us/td/docs/dcnm/aci/15x/configuration/cisco-aci-configuration-guide-151/m_cisco-aci-configuration-guide-151_chapter_0110.html#concept_3CC380A90B38406F923D4D47E0A5D66F

Topics

#EPG configuration#Bridge domain#Faults and troubleshooting

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