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Home Documentation Junos OS Junos CLI Reference CLI Reference B

Junos CLI Reference

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Junos CLI Reference
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bfd-liveness-detection (Layer 2 VPN and VPLS)

date_range 17-Dec-24
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Syntax

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bfd-liveness-detection {
    detection-time {
        threshold milliseconds;
    }
    minimum-interval milliseconds;
    minimum-receive-interval milliseconds;
    multiplier number;
    no-adaptation;
    transmit-interval {
        minimum-interval milliseconds;
        threshold milliseconds;
    }
    version (1 | automatic);
}

Hierarchy Level

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[edit logical-systems name routing-instances instance_name protocols l2vpn oam],
[edit logical-systems name routing-instances instance_name protocols vpls neighbor neighbor-id oam],
[edit logical-systems name routing-instances instance_name protocols vpls mesh-group mesh-group-name neighbor neighbor-id oam],
[edit logical-systems name routing-instances instance_name protocols vpls oam],
[edit routing-instances instance_name protocols l2vpn oam],
[edit routing-instances instance_name protocols vpls neighbor neighbor-id oam],
[edit routing-instances instance_name protocols vpls mesh-group mesh-group-name neighbor neighbor-id oam],
[edit routing-instances instance_name protocols vpls oam]

Description

Configure bidirectional failure detection timers.

The BFD failure detection timers are adaptive and can be adjusted to be more or less aggressive. For example, the timers can adapt to a higher value if the adjacency fails, or a neighbor can negotiate a higher value for a timer than the configured value. The timers adapt to a higher value when a BFD session flap occurs more than three times in a span of 15 seconds. A back-off algorithm increases the receive (Rx) interval by two if the local BFD instance is the reason for the session flap. The transmission (Tx) interval is increased by two if the remote BFD instance is the reason for the session flap. You can use the clear bfd adaptation command to return BFD interval timers to their configured values. The clear bfd adaptation command is hitless, meaning that the command does not affect traffic flow on the routing device.

The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 10.0.

Statement introduced in Junos OS Release 13.2 for Layer 2 VPNs and VPLS.

Related Documentation

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