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damping (Policy Options)


Hierarchy Level


Define route flap damping properties to set on BGP routes.


disable—Disable damping on a per-prefix basis. Any damping state that is present in the routing table for a prefix is deleted if damping is disabled.

half-life minutes—Decay half-life. minutes is the interval after which the accumulated figure-of-merit value is reduced by half if the route remains stable.

  • Range: 1 through 45

  • Default: 15 minutes


For the half-life, configure a value that is less than the max-suppress. If you do not, the configuration is rejected.

max-suppress minutes—Maximum hold-down time. minutes is the maximum time that a route can be suppressed no matter how unstable it has been.

  • Range: 1 through 720

  • Default: 60 minutes


For the max-suppress, configure a value that is greater than the half-life. If you do not, the configuration is rejected.

name—Name that identifies the set of damping parameters. The name can contain letters, numbers, and hyphens (-) and can be up to 255 characters long. To include spaces in the name, enclose it in quotation marks (“ ”).

reuse number—Reuse threshold. number is the figure-of-merit value below which a suppressed route can be used again.

  • Range: 1 through 20,000

  • Default: 750 (unitless)

suppress number—Cutoff (suppression) threshold. number is the figure-of-merit value above which a route is suppressed for use or inclusion in advertisements.

  • Range: 1 through 20,000

  • Default: 3000 (unitless)

Required Privilege Level

routing—To view this statement in the configuration.

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

Release Information

Statement introduced before Junos OS Release 7.4.