topic Re: BGP Dampening Profiles in General Topics

BGP Dampening Profiles

jason.duff — Wed, 27 Feb 2013 16:26:20 GMT

All,

Does anyone know the CLI command to use to view the dampening profiles status on flapping routes? There looks like a way to clear the status with clear counters bgp ... but I cannot find the available show command.

Thanks in advance,

Jason

Re: BGP Dampening Profiles

Abs — Wed, 27 Feb 2013 23:42:43 GMT

Hey jduff,

In CLI mode, type:

> configure

Then:

# show network virtual-router [vrouter name] default protocol bgp dampening profile [name].

This is what the output of the default profile is, after running this command:

show network virtual-router default default protocol bgp dampening profile default

Hope this was what you were looking for.

Alex

Re: BGP Dampening Profiles

jason.duff — Thu, 28 Feb 2013 02:55:54 GMT

That's not exactly what I'm looking for, thanks though.

I'm actually looking for the actual route being dampened / flapping and any related statistics for that.

show routing protocol bgp loc-rib-detail shows

Flap:

value 0.00, count 0

But I'm looking for anything else their might be.

Re: BGP Dampening Profiles

UhMayYeah — Thu, 28 Feb 2013 05:47:00 GMT

I couldn't find a show command which exhibits any information about the Dampening profiles after some extensive browsing under

>show routing protocol bgp, hierarchy.I will try to finding more on this.

Re: BGP Dampening Profiles

mikand — Thu, 28 Feb 2013 07:37:05 GMT

It feels like there should exist a counter, somewhere... the question is where

dampening-profile <name> |

{

cutoff <value> |

decay-half-life-reachable <value> |

decay-half-life-unreachable <value> |

enable {no | yes} |

max-hold-time <value> |

reuse <value>

}

routing |

{

bgp virtual-router <name> |

{

dampening {prefix <ip/netmask> | peer <value>} |

stat peer <value>

}

clear

...

> routing — Clears routing information

> bgp — Clears BGP counters

> dampening — Resets BGP route dampening status (option to filter by prefix or by BGP peer)

> stat — Clears statistic counters (option to filter by BGP peer)

Edit: By the way shouldnt there be a SYSTEM subtype=routing logmessage generated when dampening occurs (or at least an option somewhere to log these events)?

Re: BGP Dampening Profiles

jason.duff — Thu, 28 Feb 2013 15:31:49 GMT

The reason I think some sort of counter exists is that you can clear dampening statistics as mikand shows.

Basically, I'm trying to test a dampening profile by using Spirent Testcenter to insert and remove routes, over and over again. Unfortunately, I'm not seeing the routes be dampened, but can't find any statistics to tell me what is, or what is not, going on.

I would agree it seems like you would see a log message for this, but I'm not clear on that either.