300-620 · Question #133
When does the Cisco ACI leaf learn a source IP or MAC as a remote endpoint?
The correct answer is D. When VXLAN traffic arrives on a leaf fabric port from the spine and inner source IP is in the. A Cisco ACI leaf learns a source IP or MAC as a remote endpoint when VXLAN encapsulated traffic arrives on a leaf fabric port from the spine, and the leaf inspects the inner header to extract the actual source IP and MAC address of the originating endpoint. This process distingui
Question
When does the Cisco ACI leaf learn a source IP or MAC as a remote endpoint?
Options
- AWhen VXLAN traffic arrives on a leaf fabric port from the spine and outer source IP is in the Layer
- BWhen VXLAN traffic arrives on a leaf fabric port from the spine and outer source IP is in the
- CWhen VXLAN traffic arrives on a leaf fabric port from the spine and inner source IP is in the Layer
- DWhen VXLAN traffic arrives on a leaf fabric port from the spine and inner source IP is in the
How the community answered
(50 responses)- A2% (1)
- B2% (1)
- C8% (4)
- D88% (44)
Why each option
A Cisco ACI leaf learns a source IP or MAC as a remote endpoint when VXLAN encapsulated traffic arrives on a leaf fabric port from the spine, and the leaf inspects the inner header to extract the actual source IP and MAC address of the originating endpoint. This process distinguishes the endpoint as being connected to another leaf within the fabric.
The outer source IP in VXLAN traffic is the Tunnel Endpoint (TEP) address of the originating leaf switch, not the IP address of the remote endpoint itself, so learning based on the outer source IP would identify the source leaf, not the source endpoint.
The outer source IP in VXLAN traffic is the Tunnel Endpoint (TEP) address of the originating leaf switch, not the IP address of the remote endpoint itself, so learning based on the outer source IP would identify the source leaf, not the source endpoint.
This option is textually identical to D, suggesting a potential error in the question's choices provided, but based on the marked correct answer, it is not the designated correct choice.
When VXLAN traffic arrives on a leaf fabric port from the spine, representing communication from an endpoint on another leaf, the receiving leaf extracts the source IP and MAC address from the inner VXLAN header. This inner header information corresponds to the actual remote endpoint, allowing the leaf to program these attributes in its endpoint table.
Concept tested: ACI remote endpoint learning via VXLAN inner header
Source: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/sw/security/b-cisco-aci-security-config-guide-501/m-endpoint-learning.html
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