Using One-Arm BFD in Cloud Network

Document Type Expired Internet-Draft (individual)
Authors Ruixue Wang  , Weiqiang Cheng  , Yanhua Zhao  , Aihua Liu 
Last updated 2020-05-21 (latest revision 2019-11-18)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Bidirectional Forwarding Detection (BFD) is a fault detection protocol that can quickly determine a communication failure between devices and notify upper-layer applications [RFC5880]. BFD has asynchronous detecting mode and demand detection mode to satisfy different scenarios, also supports echo function to reduce the device requirement for BFD. One-Arm BFD this draft descripted supports another BFD detecting function rather than the echo as described in [RFC5880] [RFC5881], it needs nothing BFD capability to one of the devices deployed BFD detecting. Using One-Arm BFD function, the one device works on BFD detecting normally and the other device just loopback the BFD packets like echo function. One-Arm BFD is suitable for the cloud virtualization network, the One-Arm BFD is deploy on NFV gateways, and NFV virtual machine vNICs just enable the echo/ loopback process.


Ruixue Wang (
Weiqiang Cheng (
Yanhua Zhao (
Aihua Liu (

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