Which three statements are true about redistribution of routes from L3Outs in an ACI fabric? (Choose three.)
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A. B. C. D. E. F.ABE.
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ACI fabric is a software-defined networking (SDN) solution that provides policy-based automation for data center networking. One of the key features of the ACI fabric is the ability to integrate with external Layer 3 (L3) networks using L3Outs. When redistributing routes from L3Outs into the ACI fabric, the following statements are true:
A. ACI fabric runs MP-BGP. Multiprotocol Border Gateway Protocol (MP-BGP) is the routing protocol used in the ACI fabric to exchange routing information with external networks. MP-BGP is used to distribute routes from L3Outs into the ACI fabric.
B. Route control subnets control the exchange of routing information (prefixes) into and out of the fabric (control plane). Route control subnets are used to control the exchange of routing information (prefixes) into and out of the ACI fabric. These subnets are used to filter routes at the border leaf switches to prevent the redistribution of unwanted routes.
C. Routes are not redistributed to leaf switches where the same VRF is present. Virtual Routing and Forwarding (VRF) is a feature in ACI that enables the creation of isolated routing domains within a single physical infrastructure. When redistributing routes from L3Outs, routes are not redistributed to leaf switches where the same VRF is present. This prevents route duplication and helps ensure consistent routing throughout the fabric.
D. Routes learned from L3Outs on border leaf switches are not redistributed into MP-BGP at the ingress leaf. When redistributing routes from L3Outs, routes learned from L3Outs on border leaf switches are not redistributed into MP-BGP at the ingress leaf. This helps ensure that only the best route is advertised into the ACI fabric and reduces the likelihood of routing loops.
E. Security import subnets control the forwarding of packets into and out of L3Out connections (data plane). Security import subnets are used to control the forwarding of packets into and out of L3Out connections in the data plane. These subnets are used to filter traffic at the border leaf switches to prevent unauthorized traffic from entering or leaving the ACI fabric.
F. The routes are advertised to all external Layer 3 Outside connections. When redistributing routes from L3Outs, the routes are advertised to all external Layer 3 Outside connections. This helps ensure that external networks have the most up-to-date routing information and can route traffic to the appropriate destination.
Overall, redistributing routes from L3Outs in an ACI fabric requires careful planning and configuration to ensure that only the necessary routes are redistributed and that routing loops and unauthorized traffic are prevented.