OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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bgp dampening

Enables BGP route-flap dampening and configures the dampening parameters.

Syntax
bgp dampening [ half-life | reuse-limit | suppress-limit | max-suppress-time | route- map-name]
Parameters
  • half-life — (Optional) Enter the half-life time (in minutes) after which the penalty decreases. After the router assigns a penalty of 1024 to a route, the penalty decreases by half after the half-life period expires, from 1 to 45.
  • reuse-limit — (Optional) Enter a reuse-limit value, which compares to the flapping route’s penalty value. If the penalty value is less than the reuse value, the flapping route advertises again and is not suppressed, from 1 to 20000.
  • suppress-limit — (Optional) Enter a suppress-limit value, which compares to the flapping route’s penalty value. If the penalty value is greater than the suppress value, the flapping route is no longer advertised, from 1 to 20000.
  • max-suppress-time — (Optional) Enter the maximum number of minutes a route is suppressed, from 1 to 255.
  • route-map-name — (Optional) Enter the name of the route-map.
Defaults
half-life 15; reuse-limit 750; suppress-limit 2000; max-suppress-time 60
Command Mode
ROUTER-BGP-AF
Usage Information
To reduce the instability fo the BGP process, setup route flap dampening parameters. After setting up the dampening parameters, clear information on route dampening and return suppressed routes to the Active state. You can also view statistics on route flapping or change the path selection from the default deterministic mode to non-deterministic. The no version of this command resets the value to the default.
Example
OS10(conf-router-bgpv4-af)# dampening 2 751 2001 51 map1
Supported Releases
10.3.0E or later

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