From: Koen Zeilstra (koen@koenzeilstra.com)
Date: Fri May 19 2006 - 03:54:40 ART
Hi,
It's getting clearer by the minute fortunately.
However the cummulative value of the second flap penalty should be 1500 <
B < 2500. Since if it happens at t=30 (halftime) it is at its
lowest (500 + 1000 = 1500). And right after the first flap: 1000 + 1000 =
2000.
So within the 30 seconds another flap would be anything about 2000. That
makes again dampening 30 with default 2000 as suppress value the best
option.
thanks,
Koen
On Thu, 18 May 2006, Edwards, Andrew M wrote:
| Think of it this way... We know each flap is a penalty of 1000. So...
|
| The first flap is a penalty of 1000. With a half life of 30 seconds the
| maximum penalty for the first flap at time = 30 sec. is 500. Let A=500
|
| The second flap is sometime between time =0 and time =30. So we can
| deduce that the penalty from the second flap will be greater than 500 at
| the 30 second mark but less than 1000. The second flap penalty value is
| represented by B. We can safely say that 500 <= B <= 1000
|
| The third flap is sometime between the second flap and time = 30. So we
| can again deduce that the penalty from the third flap will be greater
| than 500 at the 30 second mark but less than 1000. The third flap
| penalty value is represented by C. Again, we can safely say that 500 <=
| C <= 1000
|
| What do we know then? We know that A = 500. We also know that B and C
| cannot be any larger than 500.
|
| So the LOWEST total accumulated penalty in this scenario by equation is:
|
| F(x) >= A+B+C.
| F(x) >= 500 + 500 + 500.
| F(x) >= 1500
|
| IOW, the SMALLEST accumulated penalty with a 30 second half life is
| 1500.
|
| If we use "dampen 30", then the default suppress value is 2000.
|
| Since we cannot say with certainty that the penalty is >= 2000; and I
| don't want to memorize the equation for exponential decay, we must
| change the default suppress penalty to a number >= 1500.
|
| That, or memorize the exponential decay function. 8)
|
|
| Andrew Edwards
| <<Picture (Metafile)>>
| CCIE #15334
| Senior Network Engineer
| 562-797-4454 desk
| 800-946-4646 pin 6024349
|
|
|
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