What is Bidirectional Forwarding Detection in ACI?
Cisco ACI Software Release 1.2(2g) added support for Bidirectional Forwarding Detection (BFD), which is a software feature used to provide fast failure detection and notification to decrease the convergence times experienced in a failure scenario. BFD is particularly useful in environments where Layer 3 routing protocols are running over shared Layer 2 connections, or where the physical media does not provide reliable failure detection mechanisms.
