Which option is discovered after L1 registers to APIC 1?

3 thoughts on “Which option is discovered after L1 registers to APIC 1?”

1. I think the answer is S1.
   The port on APIC 1is active/standby. After is discover L1, S1 is discovered and after it L2 is discovered.

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2. Your 100% correct Test. S1 is correct

   An APIC with 2 network connections is running with an Active-Standby connectivity scenario.
   Because it discovered L1 first, that NIC is in the Active state which means that the other connection is in Standby.
   Once L1 is acknowledged, it will find S1 and so forth using a cascading discovery process via LLDP/DHCP.

   “APICs are equipped with two Network Interface Cards (NICs) for fabric connectivity. These NICs should be connected to different leaf nodes for redundancy. APIC connectivity is automatically configured for active-backup teaming, which means that only one interface is active at any given time. You can verify (but not modify) this configuration from the Bash shell under /proc/net/bonding.”

   https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-737909.html#_Toc6452893

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3. I think the answer is wrong here. It should be S1.

   Discovery process is onced L1 is register to APIC1 controller, it will discover S1( spine) and once S1 is register to APIC 1, it will do a discover of all devices. is this not true??

   I believe the Answer should be S1.

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