The following table lists terms and definitions used in this security mode configuration discussion.
BFD Configuration Terms and Definitions
| Term | Definition |
|---|---|
| Bidirectional Forwarding Detection (BFD) | A mechanism that provides for detecting a communications failure with a forwarding plane next hop in less than one second, independent of media and protocol. |
| Asynchronous Mode | The default BFD operational mode for which both peers send periodic Control packets to one another with an application added jitter that over time creates an Asynchronous relationship between the sending and receiving of Control packets. |
| Demand Mode | A BFD operational mode for which the sending of Control packets is disabled because the local peer has another mechanism to determine if the remote peer is alive |
| Echo Mode | A BFD mechanism used by both the Asynchronous and Demand modes that tests the forwarding plane by transmitting BFD Echo packets to the remote peer, with the remote peer routing the packet back to the sender via the interface in which the packet was received. |
| Minimum Transmit Interval | The minimum interval in 50ms increments between the transmission of BFD Control or Echo packets. |
| Minimum Receive Interval | The minimum interval in 50ms increments between received Control or Echo packets the BFD session can support. |
| Multiplier | A numeric value multiplied by the negotiated transmit rate that produces the detection time. |
| Miss Count | The minimum number of consecutive Echo packets that can be missed before the BFD session transitions to down. |
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