Set Dampening - Allied Telesis SwitchBlade x908 Series Software Reference Manual

set dampening

Use this command to add a route flap dampening set clause to a route map entry.
Also use the route map by specifying it in the command bgp dampening route-map.
When a route matches the route map entry, the device enables route flap dampening for that
route. If the set clause includes dampening parameter values, the device uses those values when
dampening the matching route.
Use the no parameter to remove the set clause. This disables dampening on matching routes.
Syntax
set dampening
set dampening [<reachtime>]
set dampening <reachtime> [<reuse> <suppress> <maxsuppress>]
no set dampening
no set dampening [<reachtime>]
no set dampening <reachtime> [<reuse> <suppress> <maxsuppress>]
Parameter
<reachtime>
<reuse>
<suppress>
<maxsuppress>
<unreachtime>
Route-map mode
Mode
C613-50007-01 REV B
[<unreachtime>]
[<unreachtime>]
Description
<1-45>
The time it takes, in minutes, for the route's instability penalty to halve if
the route remains stable. The instability penalty is called the Figure of Merit
(FoM). For example, if reachtime is 15, the FoM of a stable route halves
over a 15 minute period, quarters over a 30 minute period, and so on.
The default is 15 minutes.
<1-20000>
The value that the instability penalty (FoM) must reach for the device to
use a suppressed route again. Once a route is suppressed, it remains
suppressed until its FoM falls below this threshold. Reuse must not exceed
suppress. The default is 750.
<1-20000>
The instability penalty (FoM) at which the route is suppressed. Suppress
must be greater than or equal to reuse.
If suppress is less than 1000, a route is suppressed when it becomes
unreachable for the first time. The default is 2000.
<1-255>
A number that is multiplied by reachtime to give the maximum time in
minutes for which a suppressed route must remain stable in order to
become unsuppressed. The lowest maxsuppress value of 1 gives a
maximum suppression time of 1 x reachtime, and the highest maxsuppress
value of 255 gives a maximum suppression time of 255 x reachtime.
For example, if reachtime is 15 and maxsuppress is 4, the route is
unsuppressed after 60 minutes of stability even if its FoM still exceeds
reuse. The default is 4.
<1-45>
The time it takes, in minutes, for the route's instability penalty to halve if
the route remains unstable. The default value is 15 minutes.
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
Route Map Commands
39.25