Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual page 139

clear bgp ipv6 dampening
clear ip bgp dampening
Use to enable BGP route flap dampening on all BGP routes or routes matching
a specified route map.
You can specify a complete set of values that determine how routes are
dampened. If you choose to do so, you must specify the entire set:
half-life— When this period expires, the penalty assigned to a route is
decreased by half
reuse— When the penalty for a flapping route falls below this limit, the route
is unsuppressed (added back to the BGP table and used for forwarding)
suppress—When a route's penalty exceeds this limit, the route is suppressed
max-suppress-time—When the period a route has been suppressed exceeds
this limit, the route becomes unsuppressed
If you specify the preceding set of dampening values, you can optionally specify
a half-life-unreachable period to apply to unreachable routes. If you do not specify
this value, the same half-life period is used for both reachable and unreachable
routes.
Dampening applies only to routes learned by means of EBGP.
The new dampening parameters are applied in future flaps. Changing the
dampening parameters does not affect the Figure of Merit that has been calculated
for routes using the old dampening parameters. To reset the Figure-of-Merit for
all routes, you must issue the clear ip bgp dampening command.
Use the no version to disable route flap dampening.
See bgp dampening.
Use to clear the BGP route flap dampening information and unsuppress the
suppressed routes.
You can use the flap-statistics keyword as an alternative to the dampening
keyword. Both achieve the same results.
This command takes effect immediately.
Examples
To clear IPv6 dampening information for all routes in all routers:
host1#clear bgp ipv6 dampening
To clear IPv6 dampening information for a specific route:
host1#clear bgp ipv6 dampening 6000::/64
To clear IPv4 dampening information for all routes in all address families in all
VRFs:
host1#clear ip bgp dampening
Chapter 1: Configuring BGP Routing
Configuring BGP Routing Policy
103