Which Cisco UCS policy is required for VM endpoints to be discovered by the Cisco ACI fabric?

Question

Options

• ALAN connectivity policy
• BNetwork control policy
• CDynamic VNIC connection policy
• DLACP policy

• B
  2% (1)
• C
  4% (2)
• D
  95% (52)

Explanation

LACP policy is required because Cisco UCS Fabric Interconnects connect to ACI leaf switches via Virtual Port Channels (vPCs), which depend on LACP to negotiate and form the uplink bundle. Without a properly configured LACP policy on the UCS uplinks, the port channel to the ACI fabric cannot establish, leaving the fabric unable to see or learn VM endpoints.

Why the distractors are wrong:

• A (LAN Connectivity Policy) defines vNIC assignments within a UCS service profile - it scopes connectivity inside UCS, not the physical uplink behavior toward ACI.
• B (Network Control Policy) governs CDP/LLDP advertisement and MAC registration on vNICs, which affects neighbor discovery but is not the gating requirement for VM endpoint discovery by ACI.
• C (Dynamic vNIC Connection Policy) dynamically allocates vNICs in mixed Ethernet/FCoE environments and has no direct role in ACI fabric endpoint learning.

Memory tip: Associate LACP with "Link to ACI Port-channel" - LACP is what stitches UCS uplinks into the vPC bundle that the ACI leaf switches use as the on-ramp to discover everything behind it, including VM endpoints.

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