Dell Force10 C150 Configuration Manual page 260

Figure 10-31. Setting Reuse and Restart Route Values
FTOS(conf-router_bgp)#bgp dampening ?
<1-45>
route-map
<cr>
FTOS(conf-router_bgp)#bgp dampening 2 ?
<1-20000>
FTOS(conf-router_bgp)#bgp dampening 2 2000 ?
<1-20000>
FTOS(conf-router_bgp)#bgp dampening 2 2000 3000 ?
<1-255>
FTOS(conf-router_bgp)#bgp dampening 2 2000 3000 10 ?
route-map
<cr>
Use the following command in the CONFIGURATION ROUTER BGP mode to configure route flap
dampening parameters.
Command Syntax
bgp dampening [
|
reuse suppress
max-suppress-time
[ route-map
map-name
To view the BGP configuration, use
show running-config bgp
260 | Border Gateway Protocol IPv4 (BGPv4)
Half-life time for the penalty (default = 15)
Route-map to specify criteria for dampening
Value to start reusing a route (default = 750)
Value to start suppressing a route (default = 2000)
Maximum duration to suppress a stable route (default = 60)
Route-map to specify criteria for dampening
Command Mode
half-life | CONFIG-ROUTER-B
GP
]
]
in EXEC Privilege mode.
Purpose
Enable route dampening.
Enter the following optional parameters to configure route
dampening parameters:
• range: 1 to 45. Number of minutes after which the
half-life
Penalty is decreased. After the router assigns a Penalty of
1024 to a route, the Penalty is decreased by half after the
half-life period expires.
• reuse range: 1 to 20000. This number is compared to the
flapping route's Penalty value. If the Penalty value is less
than the reuse value, the flapping route is once again
advertised (or no longer suppressed). Withdrawn routes are
removed from history state. (Default: 750)
• suppress range: 1 to 20000. This number is compared to the
flapping route's Penalty value. If the Penalty value is greater
than the suppress value, the flapping route is no longer
advertised (that is, it is suppressed). (Default: 2000.)
•
max-suppress-time
of minutes a route can be suppressed. The default is four
times the half-life value. (Default: 60 minutes.)
route-map
•
Only match commands in the configured route map are
supported. Use this parameter to apply route dampening to
selective routes.
show config
in the CONFIGURATION ROUTER BGP mode or
Set time before
value decrements
Set readvertise value
Set suppress value
Set time to suppress
(
Default: 15 minutes)
range: 1 to 255. The maximum number
map-name: name of a configured route map.
a route