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Cisco Bug: CSCus71069 - BGP route dampening reuse countdown timer is incorrect.

Last Modified

Feb 11, 2015

Products (21)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.4(2)S

Description (partial)

Symptom:
R3(config)#do show ip bgp 1.1.1.0 | inc reuse
Dampinfo: penalty 2080, flapped 3 times in 00:07:59, reuse in 00:00:19 <---

*Note the penalty is at 2080 and reuse time is 19 seconds.
*A few seconds later the timer resets to an inexplicable value:

R3(config)#do show ip bgp 1.1.1.0 | inc reuse
Dampinfo: penalty 2056, flapped 3 times in 00:08:16, reuse in 00:10:54 <--- resets to an unexpected value.

It appears that the feature is working correctly, based on a manual count down. However, the parser output makes determining the actual reuse time from the console output impossible.

Conditions:
The following parameters were used:

R3(config)#do sho ip bgp dampening parameters
 dampening 15 750 2000 30
  Half-life time      : 15 mins       Decay Time       : 520 secs
  Max suppress penalty:  3000         Max suppress time: 30 mins
  Suppress penalty    :  2000         Reuse penalty    : 750
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Bug Details Include

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