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    hold-down-interval (BGP BFD Liveness Detection)

    Syntax

    holddown-interval milliseconds;

    Hierarchy Level

    [edit logical-systems logical-system-name protocols bgp bfd-liveness-detection],[edit logical-systems logical-system-name protocols bgp group group-name bfd-liveness-detection],[edit logical-systems logical-system-name protocols bgp group group-name neighbor address bfd-liveness-detection],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp bfd-liveness-detection],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp group group-name bfd-liveness-detection],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp group group-name neighbor address bfd-liveness-detection],[edit protocols bgp bfd-liveness-detection],[edit protocols bgp group group-name bfd-liveness-detection],[edit protocols bgp group group-name neighbor address bgp bfd-liveness-detection],[edit routing-instances routing-instance-name protocols bgp bfd-liveness-detection],[edit routing-instances routing-instance-name protocols bgp group group-name bfd-liveness-detection],[edit routing-instances routing-instance-name protocols bgp group group-name neighbor address bfd-liveness-detection]

    Release Information

    Statement introduced in Junos OS Release 8.5.

    Statement introduced in Junos OS Release 9.0 for EX Series switches.

    Support for BFD authentication introduced in Junos OS Release 9.6.

    Statement introduced in Junos OS Release 12.1 for the QFX Series.

    Description

    Configure an interval specifying how long a BFD session must remain up before a state change notification is sent.

    When you configure the hold-down interval for the BFD protocol for EBGP, the BFD session is unaware of the BGP session during this time. In this case, if the BGP session goes down during the configured hold-down interval, BFD already assumes the BGP session is down and does not send a state change notification. The holddown-interval statement is supported only for EBGP peers at the [edit protocols bgp group group-name neighbor address] hierarchy level. If the BFD session goes down and then comes back up during the configured hold-down interval, the timer is restarted. You must configure the hold-down interval on both EBGP peers. If you configure the hold-down interval for a multihop EBGP session, you must also configure a local IP address by including the local-address statement at the [edit protocols bgp group group-name] hierarchy level.

    Options

    milliseconds—Specify the hold-down interval value.

    Range: 0 through 255,000

    Default: 0

    Required Privilege Level

    routing—To view this statement in the configuration.

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

     

    Related Documentation

     

    Published: 2013-01-22

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