Juniper JUNOSE 11.1.X - COMMAND REFERENCE N TO Z 4-6-2010, Command Reference Manual

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set dampening
Syntax
set dampening halfLife reuse suppress maxSuppressTime [ halfLifeUnreachable ]
no set dampening
Release Information
Command introduced before JUNOSe Release 7.1.0.
Description
Enables route flap dampening and optionally specifies dampening parameters for
routes passing through the route map. The
no version removes the set clause from
a route map.
Options
■
halfLife —Half-life period in minutes, in the range 1–45; default value is 10. When
a BGP route has been assigned a penalty, the penalty is decreased by half after
each half-life period. Each time a route flaps, the router configured for route flap
dampening assigns the route a penalty. Penalties are cumulative. BGP stores the
penalty for all reachable and unreachable routes that have experienced recent
flaps.
■
reuse —Reuse limit in the range 1–20000; default value is 750. As the penalty
for a flapping route decreases and falls below this reuse limit, the route is
unsuppressed. That is, the route is added back to the BGP table and used for
forwarding.
■
suppress —Suppress limit in the range 1–20000; default value is 2000; a route is
suppressed when its penalty exceeds this limit
■
maxSuppressTime —Maximum suppression time in minutes, in the range 1–255;
default value is 60; maximum amount of time a route can be suppressed
■
halfLifeUnreachable —Alternate half-life period in minutes for unreachable routes;
a number in the range 1–45; default value is 20. If you do not specify this value,
the router uses the same half-life period for both reachable and unreachable
routes.
Mode
Route Map Configuration
set dampening
■ 473
Chapter 7: S Commands