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hold-down-interval (BGP BFD Liveness Detection)

 

Syntax

Hierarchy Level

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.

Statement introduced in Junos OS Release 14.1X53-D20 for the OCX 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.