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bgp dampening
Syntax
[ no ] bgp dampening [ halfLife [ reuse suppress maxSuppressTime
[ halfLifeUnreachable ] ] ] [ route-map mapTag ]
Release Information
Command introduced before JUNOSe Release
7.1.0.
Description
Enables BGP route dampening. The router assesses
a penalty of 1000 each time a route flaps and adds this to any previously
accumulated penalty value. Penalties are cumulative. The no version disables route flap dampening.
Options
-
halfLife—Half-life period
in minutes in the range 1–45; default value is 15. When a BGP
route has been assigned a penalty, the penalty is decreased by half
after the half-life period.
-
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. This value is the maximum
amount of time a route can be suppressed. The default value is four
times the half-life value.
-
halfLifeUnreachable—Alternate
half-life period in minutes for unreachable routes; a number in the
range 1–45. If this value is not specified, the same half-life
period is used for both reachable and unreachable routes.
- route-map—Specifies that dampening can be applied
to routes according to the route map behavior. If the route map permits a route, the route is subject to dampening. If
the route map denies a route, the route is not
subject to dampening. The route map can contain a no dampening clause that determines dampening characteristics.
-
mapTag—Name of the route map;
a string of up to 32 alphanumeric characters.
Address Family Configuration, Router Configuration
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