Configure BGP to Coordinate with BFD

Usually, there are still some intermediate devices between BGP neighbors. When an intermediate device becomes faulty, the BGP session is normal within the hold time, and the link fault cased by the intermediate device cannot be responded to in time. Bidirectional Forwarding Detection (BFD) provides a method for quickly detecting the status of a line between two devices. After BFD is enabled for BGP devices, if a line between two devices becomes faulty, BFD can quickly find the line fault and notifies BGP of the fault. It triggers BGP to quickly disconnect the session and quickly switch over to the backup line, achieving fast switchover of routes.

Configuration Condition

Before configuring BGP to coordinate with BFD, ensure that:

• BGP is enabled.
• BGP neighbors are configured and a session is set up successfully.

Configure EBGP to Coordinate with BFD

The coordination between EBGP and BFD is based on a single-hop BFD session, and BFD session parameters need to be configured in interface mode.

Table 12-46 Configure EBGP to coordinate with BFD

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  For the related configuration of BFD, refer to the reliability technology-BFD technical manual and BFD configuration manual.

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