300-620 DCACI: Implementing Cisco Application Centric Infrastructure

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QuestionQ18

ACI Packet Forwarding

Refer to the exhibit.

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Two L3Outs have been configured under the same VRF, along with a route map named Any_Route_RtCtrl. The fabric is deployed as follows:

  • The two L3Outs have received a default route.
  • Both External EPGs imported the route map.
  • R1 and the firewall advertise summarized private RFC subnets to ACI.

A design change is required to let traffic bypass the firewall and use R1 before it reaches subnet 10.16.29.0/28.

Which action set meets this requirement?

Explanation

BGP selects the path with the highest local preference. Assigning local preference 200 to the default route received through GiDNS_CPN_L3Out makes the R1 path preferred over the firewall path. Adding 10.0.0.0/8 to the route-control map on FWE_GiDNS_L3out permits advertising the summarized private address space toward the firewall, enabling it to forward that traffic to R1. Cisco ACI route-control profiles apply route-map policy to routes advertised into and out of an L3Out, and their action rules support setting BGP preference.

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