During the APIC cluster discovery process, LLDP is used for which of the following tasks?
- assignment of VTEP addresses
- discovering MAC addresses
- discovering private IP addresses
- serving the APIC GUI
Link-Layer Discovery Protocol (LLPD) is used for discovering private Internet Protocol (IP) addresses during the Cisco Application Policy Infrastructure Controller (APIC) cluster discovery process. LLDP is used by APIC controllers to discover the private IP addresses and other information assigned to other APIC controllers in the cluster. LLDP is a standard protocol that detects neighboring devices of any type.
LLDP is not used to assign virtual extensible local area network (VXLAN) tunnel endpoints (VTEPs). However, a Cisco Application Centric Infrastructure (ACI) fabric uses LLDP along with Dynamic Host Configuration Protocol (DHCP) to discover switch nodes and to assign IP addresses to VTEPs. LLDP is also used by APIC to detect virtual switches, although it is possible to use Cisco Discovery Protocol (CDP) for that purpose.
LLDP is not used to serve the APIC graphical user interface (GUI). The APIC GUI is constructed in Hypertext Markup Language (HTML) 5. Therefore, Hypertext Transfer Protocol (HTTP), not LLDP, serves the APIC GUI.
LLDP is not used to discover Media Access Control (MAC) addresses. A switched network uses Address Resolution Protocol (ARP) to map MAC addresses to IP addresses.