As part of a new network design documentation, you are required to explain the reason for choosing cisco FabricPath for Layer 2 loop avoidance. Which two elements help Cisco FabricPath mitigate…

MAC tunneling preserves original source and destination MAC addresses by encapsulating them inside the FabricPath header for transport, but it is not a loop-detection or loop-suppression mechanism.

IS-IS multipath enables equal-cost load balancing across multiple fabric paths for better utilization, but it does not detect or break forwarding loops in the data plane.

FabricPath performs a Reverse Path Forwarding (RPF) check on multi-destination frames by verifying that each frame arrives on the interface expected per the IS-IS topology - frames arriving on a non-RPF interface are silently dropped, breaking any forwarding loop at the point of detection.

FabricPath inserts a TTL field into the outer FabricPath header on ingress; each transit switch decrements the TTL and discards the frame if it reaches zero, providing a hard upper bound on how many hops a looping frame can traverse before it is eliminated.