Online Access Free 300-620 Practice Test
| Exam Code: | 300-620 |
| Exam Name: | Implementing Cisco Application Centric Infrastructure |
| Certification Provider: | Cisco |
| Free Question Number: | 113 |
| Posted: | Aug 20, 2022 |
| # of views: | 2636 |
| # of Questions views: | 1135 |
| Go To 300-620 Exam Questions | |
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No.# Explanation:
When traffic enters from l3 out remote ep learning does not happen. Only src mac gets learned as local endpoint in ingress leaf.
Regardless of this limitation, it is not efficient to maintain all outside IP addresses as separate /32 or /128 endpoints.
Cisco ACI must know how to reach these IP addresses as prefixes through routing protocols such as Open Shortest Path First (OSPF), which is the same behavior as for traditional routers.
However, Cisco ACI needs to know only the next hop (external router) for those prefixes.
Because of this consideration, Cisco ACI uses a behavior similar to that in traditional networks for L3Out connectivity.
The Cisco ACI L3Out domain learns the MAC address only from the data plane.
IP addresses are not learned from the data plane in an L3Out domain; instead, Cisco ACI uses ARP to resolve next-hop IP and MAC relationships to reach the prefixes behind external routers.
So it only learns the MAC of the L3Out.
It would also be a local endpoint on the ingress switch because it learned it on an access port and not from the fabric port (which would be remote endpoint).
Reference:
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739989.html...