North American Network Operators Group

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Re: The Big Squeeze

  • From: Avi Freedman
  • Date: Mon Mar 03 10:13:07 1997

> Computational power required for a route flap is not the issue here.
> Many people have stated that, statistically longer prefixes flap
> more.  Unfortunately, they have then said that because of this shorter
> prefixes should have looser dampening parameters put on them, when
> what they really meant was that the longer prefixes should have more
> strict dampening parameters put on them.  Yes it is exactly the same
> thing, but it is an important semantic distinction.  If a group of
> prefixes categorized by a its length tends to flap more than the
> average, then said group should have more strict dampening parameters
> placed on it.
> Alec

You're right - what you propose makes some sense.  The reason people
have proposed and are damnening on longer prefixes is:

1) To encourage people to renumber into larger (P and/or PI) space, and
2) To lessen the percentage of the net which will be temporarily
   unreachable by the aggressive dampener.


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