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300-620 · Question #240

Refer to the exhibit. An engineer applies an OSPF L3Out between a Cisco ACI fabric and an external router. Router1 must receive a default route from the Cisco ACI via OSPF. Which action ensures that…

The correct answer is A. Configure a default route leak policy in the L3Out. A default route can also be advertised out using a Default Route Leak policy. This policy supports advertising a default route if it is present in the routing table or it always supports advertising a default route. The Default Route Leak policy is configured in the L3Out…

External Network Connectivity

Question

Refer to the exhibit. An engineer applies an OSPF L3Out between a Cisco ACI fabric and an external router. Router1 must receive a default route from the Cisco ACI via OSPF. Which action ensures that the ACI fabric is the Layer 3 gateway for Router1?

Exhibit

300-620 question #240 exhibit

Options

  • AConfigure a default route leak policy in the L3Out.
  • BApply an OSPF interface policy in the OSPF interface profile.
  • CAssociate the external EPG with the appropriate contract.
  • DInclude an OSPF route summarization policy in external EPG.

How the community answered

(36 responses)
  • A
    83% (30)
  • B
    3% (1)
  • C
    11% (4)
  • D
    3% (1)

Explanation

A default route can also be advertised out using a Default Route Leak policy. This policy supports advertising a default route if it is present in the routing table or it always supports advertising a default route. The Default Route Leak policy is configured in the L3Out connection. x/L3_config/b_Cisco_APIC_Layer_3_Configuration_Guide/b_Cisco_APIC_Layer_3_Configuratio n_Guide_chapter_010100.html Use "Leak Default Route in Addition" when a default route needs to be advertised on top of other routes. Use “Leak Default Route Only” when only a default route should be advertised. When "Leak Default Route Only" is selected, deny-all is applied to outbound route-maps on each BGP peer in this L3Out. infrastructure/guide-c07-743150.html

Topics

#L3Out#OSPF#Default route advertisement#Route leak policy

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