BFD is a critical, CRITICAL, component of SDA and SD-WAN. So it’s worth taking a deep look at it here. References:CiscoIETF The process flow is:1. The routing protocol, OSPF for instance, discovers a neighbor.2. The routing protocol tells the BFD process to start a BFD peering relationship with that same neighbor.3. If a failure occurs,Continue reading “1.2.j Bidirectional Forwarding Detection”