HP VPN Firewall Appliances Network Management Command Reference

452
Related commands
• confederation id
• confederation nonstandard
dampening (BGP/BGP-VPN instance view)
Use dampening to enable BGP route dampening, configure dampening parameters, or both.
Use undo dampening to disable route dampening.
Syntax
dampening [ half-life-reachable half-life-unreachable reuse suppress ceiling | route-policy
route-policy-name ] *
undo dampening
Default
No route dampening is configured.
Views
BGP view, BGP-VPN instance view
Default level
2: System level
Parameters
half-life-reachable: Specifies a half-life for active routes from 1 to 45 minutes. By default, the value is 15
minutes.
half-life-unreachable: Specifies a half-life for suppressed routes from 1 to 45 minutes. By default, the
value is 15 minutes.
reuse: Specifies a reuse threshold value for suppressed routes from 1 to 20000. A suppressed route
whose penalty value decreases under the value is reused. By default, the reuse value is 750.
suppress: Specifies a suppression threshold from 1 to 20000. The route with a penalty value higher than
the threshold is suppressed. The default value is 2000.
ceiling: Specifies a ceiling penalty value from 1001 to 20000. The value must be bigger than the
suppress value. By default, the value is 16000.
route-policy-name: Specifies routing policy name, a case-sensitive string of 1 to 63 characters.
half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually dependent. Once any
one is configured, all the others should also be specified.
Usage guidelines
The command dampens only EBGP routes rather than IBGP routes.
Examples
# In BGP view, configure BGP route dampening.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] dampening 15 15 1000 2000 10000
# In BGP-VPN instance view, configure BGP route dampening. (The VPN has been created.)