From: Peter van Oene (pvo@usermail.com)
Date: Fri Jun 20 2003 - 16:48:48 GMT-3
At 01:18 PM 6/20/2003 -0400, John Matijevic wrote:
> half-life
> (Optional) Time (in minutes) after which a penalty is decreased. Once
>the route has been assigned a penalty, the penalty is decreased by half
>after the half-life period (which is 15 minutes by default). The process of
>reducing the penalty happens every 5 seconds. The range of the half-life
>period is 1 to 45 minutes. The default is 15 minutes.
If this is for a real network, I might suggest doing some research on the
value of damping. A lot of folks have cast some serious doubt on it's
effectiveness recently.
>Hello I tried the suggestion Todd made, yes I saw dampening in action
>because the route in the bgp table was now marked with an h. And if I look
>at the sh ip bgp flap-statistics, I see that the history route is now listed
>here.
>Also you have to enable route dampening under the bgp process to see this.
>However, when I do a show ip bgp route-dampened I do not see the route in
>here, how do I get the route there?
>Finally what is the penalty the route is assigned to what is the numerical
>value for this?
>Sincerely,
>Matijevic
>----- Original Message -----
>From: "Todd Carswell" <acarswell@nc.rr.com>
>To: "John Matijevic" <matijevi@bellsouth.net>
>Cc: <ccielab@groupstudy.com>
>Sent: Friday, June 20, 2003 12:40 PM
>Subject: Re: route dampening with bgp
>
>
> > John,
> >
> > Using a bgp network statement, advertise one of your interfaces into
> > BGP. Next, shut down the interface and bring it back up. Go to a bgp
> > neighbor and use show commands to view the dampening in action.
> >
> > If you go through a few iterations of this, the bgp neighbor will
> > eventually suppress the flapping route.
> >
> > Todd
> >
> >
> >
> > John Matijevic wrote:
> >
> > >Hello Team,
> > >I am looking for a way to simulate a flapping route on my BGP network so
>I can
> > >test the route dampening feature. Does anybody know of a way I can
>simulate or
> > >make on of my networks flapping.
> > >Sincerely,
> > >Matijevic
> > >
> > >
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