Which physical connection rule must you follow when the Cisco ACl fabric is wired?

Spine switches connect to the fabric ports of leaf switches, not typically to 'access ports,' which are generally used for endpoint connectivity.

In a Cisco ACI fabric's spine-leaf architecture, leaf switches provide access for endpoints and directly connect to spine switches, which handle high-speed forwarding between leaves. This direct spine-to-leaf connection is the fundamental wiring rule.

Direct connections between leaf switches are explicitly prohibited in the standard Cisco ACI spine-leaf fabric design to maintain the clean two-tier architecture and avoid potential forwarding loops or suboptimal paths.

Direct connections between spine switches are explicitly prohibited in the standard Cisco ACI spine-leaf fabric design to maintain a consistent forwarding model and simplify troubleshooting.