– The Hello interval (Default of 50 milliseconds)
The configurable parameters used in the session include: This results in expedited, sub-second detection of failed forwarding-paths, leading to quicker convergence.īFD on NX-OS runs in Asynchronous mode, where a BFD neighbor relationship session is formed between two adjacent devices, and they exchange control packets to monitor the session. Without further ado.īidirectional Forwarding Detection (BFD) is a protocol designed to quickly detect failures in the forwarding-path, and notify the configured protocols (OSPF, EIGRP, BGP, HSRP, etc) immediately, before they’ve even had an opportunity to be aware of the failure themselves. In this blog post, I’ll be explaining BFD and going over it’s relevance for dynamic routing protocols. BDF is listed in the CCIE Data Center Lab Blueprint as, “1.2.c – Implement BFD for dynamic routing protocols”.
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