200-155 · Question #181
Refer to the exhibit, which device is discovered after L1 registers to APIC 1?
The correct answer is B. L2. In a Cisco ACI fabric, after a leaf switch like L1 registers with an Application Policy Infrastructure Controller (APIC), the APIC proceeds to discover other fabric nodes, such as a peer leaf switch L2, that are reachable through the established fabric.
Question
Refer to the exhibit, which device is discovered after L1 registers to APIC 1?
Exhibit
Options
- AOOB MGMT switch
- BL2
- CS1
- DAPIC 2
How the community answered
(68 responses)- A6% (4)
- B90% (61)
- C1% (1)
- D3% (2)
Why each option
In a Cisco ACI fabric, after a leaf switch like L1 registers with an Application Policy Infrastructure Controller (APIC), the APIC proceeds to discover other fabric nodes, such as a peer leaf switch L2, that are reachable through the established fabric.
An Out-Of-Band (OOB) management switch is typically external to the ACI fabric data plane and not part of the in-band fabric discovery process for fabric nodes.
Once a leaf switch (L1) registers with an APIC, the APIC's fabric discovery process continues to identify other connected fabric nodes, including peer leaf switches (L2), using protocols like LLDP over the fabric links.
A spine switch (S1) is typically discovered by a leaf switch (L1) during its initial fabric bring-up, often before or as L1 registers with the APIC, rather than being discovered *after* L1 registers.
APIC 2, another controller, is discovered by the APIC cluster through the fabric after the initial fabric setup, not necessarily directly after a single leaf switch's registration.
Concept tested: Cisco ACI Fabric discovery process
Source: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/getting-started/cisco-aci-getting-started-guide-5x/m-setting-up-aci-fabric-initial-setup.html
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