RE: Route Dampening

From: ccahoon@maine.rr.com
Date: Mon Oct 24 2005 - 17:45:46 GMT-3

Thanks Simon, I just tried it by flapping the link 5 times and can see what
you are talking about. So, I would agree that the Suppress-threshold should
be 4001, because it would be hard to tell when the flaps would be in 30
seconds and the maximum of 4 flaps would only be a penalty of 4000

Original Message:
-----------------
From: simon hart simon@harttel.com
Date: Mon, 24 Oct 2005 21:31:03 +0100
To: ccahoon@maine.rr.com, ccielab@groupstudy.com
Subject: RE: Route Dampening

Charles,

You will get a penalty of 1000 for each flap. Your half-life will default
to 30 seconds (best to leave it there).

You need to work out what to suppress at

If you flapped immediately 5 times in the first couple of seconds you will
get a penalty of 5000, however a figure of 5000 does not work in the
following scenario:-

If you flapped 2 times in the first second = 2000 and then flapped 3 times
in the last couple of seconds you will get a penalty of

roughly 2000/2 = 1000 + 3000 Therefore you will need a suppress-threshold
of 4000 or above, but below 5000

I would probably go for 4001 - any comments on this figure appreciated.

So
Half-life = 30
Suppress-threshold = 4001
Reuse-threshold = Arbitary for this exercise, however I would go with Cisco
recommendation of suppress-threshold = reuse*2, therefore 2000
Max-suppress = leave at default (60)

Simon

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Charles Cahoon
Sent: 24 October 2005 20:30
To: ccielab@groupstudy.com
Subject: Route Dampening

Looking for a simple explanation,

I have read a great deal about how to dampen but it's not getting any
clearer
for me. I was hoping that someone can help.

My question is if I want to remove a route if it flaps 5 times in 30
seconds?

Using the "Half-Life, Suppress Threshold, Reuse Threshold and Maximum
Suppress
time" not sure these correlate, what am I missing?

Thanks for the help

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