Just to play devils advocate -- I am pretty sure that this changed to what we are all describing a LONG time ago -- as in it used to be different in like IOS 11.0 ...but nobody really cares : )
On Thu, Mar 18, 2010 at 11:12 AM, Marko Milivojevic <[email protected]>wrote: > That's exactly what it's supposed to happen. Half-life is the amount > of time that needs to elapse for the penalty to be cut in half. Given > no flaps happen, in 15 minutes, total penalty will be 250. After 15 > minutes more, it will be 125... and so on. That's how half-life works. > > -- > Marko Milivojevic - CCIE #18427 > Senior Technical Instructor - IPexpert > > YES! We include 400 hours of REAL rack > time with our Blended Learning Solution! > > Mailto: [email protected] > Telephone: +1.810.326.1444 > Fax: +1.810.454.0130 > Web: http://www.ipexpert.com/ > > On Tue, Oct 6, 2009 at 07:51, Cristian Nedelcu > <[email protected]> wrote: > > and 15min , no more or less > > BGP routing table entry for 1.0.0.0/8, version 7 > > Paths: (1 available, no best path) > > Not advertised to any peer > > 1 (history entry) > > 12.0.0.1 from 12.0.0.1 (12.0.0.1) > > Origin IGP, metric 0, localpref 100, external > > Dampinfo: penalty 499, flapped 1 times in 00:15:03 > > > > original penalty was 1000 > > > > > > > > On 17.03.2010 23:50, pra pa wrote: > > > > Little math here . > > > > Basically it is exponential factor determined by using the equation. > > > > :-) > > > > ________________________________ > > From: [email protected] > > Date: Wed, 17 Mar 2010 17:21:00 -0400 > > To: [email protected] > > CC: [email protected] > > Subject: Re: [OSL | CCIE_RS] BGP Route Dampening > > > > The example in the Cisco Press book rather. The half-life actually will > > determine the rate of decay. As I said, the time that it takes for the > > penalty to decay by half is the half-life time. Therefore, the half-life > > determines the decay rate. > > > > On Wed, Mar 17, 2010 at 4:54 PM, Joe Astorino <[email protected]> > > wrote: > > > > Actually, that is not correct. The half-life is the amount of time it > takes > > for the penalty to decay by half of the original value. For instance -- > If > > you have a penalty of 1000 on a prefix assigned, with a default half-life > of > > 15 minutes, than after 15 minutes the penalty will be at 500. > > > > The specific example that was brought up on cisco.com appears to be > > inaccurate. Don't worry, it's not the first time : ) > > > > > > > > On Wed, Mar 17, 2010 at 4:50 PM, Patrice Ngassam <[email protected]> > > wrote: > > > > 15 minutes is the time it will take to decrease the penalty to zero, in > 7.5 > > minutes the penalty will reach half of its initial value. half-time has > more > > to do with Penalty than Time. > > > > Patrice Ngassam > > Ceritified Cisco CCNP, CCDP, CCIP > > > > > > > > > > ________________________________ > > From: [email protected] > > Date: Wed, 17 Mar 2010 16:35:19 -0400 > > To: [email protected] > > CC: [email protected] > > Subject: Re: [OSL | CCIE_RS] BGP Route Dampening > > > > Well, what is the original penalty value given? > > > > > > On Wed, Mar 17, 2010 at 4:31 PM, Cristian Nedelcu > > <[email protected]> wrote: > > > > "The rate of decrease in the penalty is a function of the half-life. The > > half-life is the amount of time for the penalty to decrease to half of > its > > current value. If the half-life is 15 minutes, the penalty decreases to > 500 > > in 7.5 minutes." > > From BGP-4 Command and Configuration Handbook > > > > why 7,5 min and not 15 min ? > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > > > > > > > -- > > Regards, > > > > > > > > Joe Astorino - CCIE #24347 (Earned not bought) > > Sr. Technical Instructor - IPexpert > > Mailto: [email protected] > > Telephone: +1.810.326.1444 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > > training locations throughout the United States, Europe, South Asia and > > Australia. Be sure to visit our online communities at > > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > ________________________________ > > Envie de naviguer sur Internet sans laisser de trace? La solution avec > > Internet Explorer 8 > > > > > > -- > > Regards, > > > > > > > > Joe Astorino - CCIE #24347 (Earned not bought) > > Sr. Technical Instructor - IPexpert > > Mailto: [email protected] > > Telephone: +1.810.326.1444 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > > training locations throughout the United States, Europe, South Asia and > > Australia. Be sure to visit our online communities at > > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > > > > > -- > > Regards, > > > > > > > > Joe Astorino - CCIE #24347 (Earned not bought) > > Sr. Technical Instructor - IPexpert > > Mailto: [email protected] > > Telephone: +1.810.326.1444 > > Live Assistance, Please visit: www.ipexpert.com/chat > > eFax: +1.810.454.0130 > > > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco > > CCIE (R&S, Voice, Security & Service Provider) certification(s) with > > training locations throughout the United States, Europe, South Asia and > > Australia. Be sure to visit our online communities at > > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > > ________________________________ > > Hotmail: Trusted email with powerful SPAM protection. Sign up now. > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > -- Regards, Joe Astorino - CCIE #24347 (Earned not bought) Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com
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