Amir,
Sorry Looking at other things
So here is the formula.
Max penalty = reuse-limit *2^(maximum suppress time/half time)
I was messed up with the formula for a second so will explain the
carrat is 2 to the nth
So in your example below
24000 = 1500 * 2^(20/5) {2 to the 4th}
So the maximum that maximum penalty can be is 20000
20000 = x * 2 to the 4th
reuse limit would need to be 1250 to be equal to 20000
On Mon, Apr 14, 2008 at 2:30 PM, Amir.Tahir/Wateen/Lahore
<[EMAIL PROTECTED]> wrote:
> Dear Scott,
>
> Thank you for the reply. I would like to clear it one more time to solid
> my concept...
>
> Lets say if half life is given as 5 sec(default) and asked to take
> interface out after 3 flaps... I suppose to consider suppress threshold
> as 3000 (default) and could configure reuse threshold to 1500.... How I
> could use Maximum duration to suppress an interface..... In doc CD its
> mentioned like.. "The default of the maximum penalty timer is 20 seconds
> or four times the default half-life period (5 seconds)". If I use 20 IOS
> calculate Maximum Penalty as 24000 how its calculating it..Please
> explain
>
> R1(config-if)#dampening 5 1500 3000 20 restart 500
> % Maximum penalty (24000) is more than allowed maximum (20000). Reduce
> maximum suppress time.
>
>
> My final configuration will be
> Int f 0/0
> Dampening 5 1500 3000 15 restart 500
>
>
> Thank you for your feedback in advance
>
>
> Regards
> __________________
> Amir Tahir
>
>
>
> -----Original Message-----
> From: Tyson Scott [mailto:[EMAIL PROTECTED]
> Sent: Monday, April 14, 2008 6:41 PM
> To: Amir.Tahir/Wateen/Lahore
> Cc: [email protected]
> Subject: Re: [OSL | CCIE_RS] IP Event Dampening
>
> Amir,
> I hope I understand your first question.
>
> 1. No
> 2. Yes
> 3. No
> 4. If your half life is 4 seconds it would take 4 flaps in less than 4
> seconds to push the penalty to 4000. The interface would then go into
> penalty. If the interface did not flap again after 4 seconds it would
> then go to 2000. It looks like you have left the unsupress at default
> so it would then reach 1000 after 8 seconds and be ready for re-use.
> 5. Less than or equal to
>
> Here are the links
> Configuration Guide
> http://www.cisco.com/en/US/docs/ios/12_4/ip_route/configuration/guide/h_
> ipevdp.html#wp1032378
> Command Reference
> http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_pi1.ht
> ml#wp1011620
>
>
> On Mon, Apr 14, 2008 at 7:30 AM, Amir.Tahir/Wateen/Lahore
> <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > Dear Members,
> >
> >
> >
> > With reference to the topic IP event Dampening, please confirm the
> following
> >
> > 1. Can we control number of flaps in any given time period -
> Yes/No
> >
> > 2. Default penalty is 1000 for single flap. If half-life will be
> > configured 30 sec, after 30 sec penalty will be 500 - Yes / No
> >
> > 3. Can we change the flap penalty value ?
> >
> > 4. If I configure suppress threshold to 3500, within half-life
> 4
> > interface flap will push interface to Dampening state
> >
> > 5. If I configure reuse threshold to 1500, interface will be
> actively
> > participating in Routing once penalty is less than 1500
> >
> >
> >
> >
> >
> > Syntax of the command is
> >
> > dampening[half-life-period reuse-threshold] [suppress-threshold
> max-suppress
> > [restart-penalty]]
> >
> >
> >
> > Thanks for help and support in advance
> >
> >
> >
> > Regards
> >
> > __________________
> >
> > Amir Tahir
>
>
>
> --
> Tyson Scott - CCIE #13513 R&S and Security
> Technical Instructor - IPexpert, Inc.
>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: [EMAIL PROTECTED]
>
> Join our free online support and peer group communities:
> http://www.IPexpert.com/communities
>
> IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On
> Demand and Audio Certification Training Tools for the Cisco CCIE R&S
> Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and
> CCIE Storage Lab Certifications.
>
--
Tyson Scott - CCIE #13513 R&S and Security
Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
Mailto: [EMAIL PROTECTED]
Join our free online support and peer group communities:
http://www.IPexpert.com/communities
IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On
Demand and Audio Certification Training Tools for the Cisco CCIE R&S
Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and
CCIE Storage Lab Certifications.
