High Availability

This post is a second blog post in a series. For the series, click here BFD Asynchronous mode (based on control packets only), discussed in the previous post already provides a lightweight, standardized and unified method of detecting failure between two devices. On advanced routing platforms, the ASICs on the receiving ports can be programmed […]

Bidirectional Forwarding Detection is a standards based protocol defined in RFC 5880, whose sole purpose is to detect communication failure between two devices quickly and efficiently. Even though BFD is responsible for detecting the failures, any BFD capable protocols (IS-IS, OSPF, BGP etc.) can use this information and make their decisions independently. Since BFD is