Re: DRAFT 2.0 of Route-Flap Dampening Paper, last call for comments

["Christian Panigl, ACOnet/UniVie" <]

>Date: Sun, 8 Feb 1998 20:32:03 -0500 (EST)
>From: Andrew Partan asp@localhost
>
>I don't really have much of a problem with some 'golden' prefixes
>but I think that you should put down some more of the reasoning
>and background in the document.

    Hi Andrew,
    
    yeah, thanks, your question triggered another final-final update, which
    made it into the doc:
    
=======================================================================
= 1.6. "Golden Networks"
=
= Even though damping is strongly recommended, in some cases
= it may make sense to exclude certain networks or even individual
= hosts from damping. This is especially true if damping would cut
= of the access to vital infrastructure elements of the Internet. A most
= prominent example are root nameservers.
=
= At least in principle, there should be enough redundancy for root
= nameservers.  Though, in fact we are still facing a situation where, at
= least outside USA, large parts of the Internet are seeing all of them
= through the same one or two backbone/upstream links (sea cable) and
= any instability of those links which is triggering damping would
= unnecessarily prolong the inaccessibility of the root nameservers for an
= hour (at least those sitting in a /24 or longer prefix).  Therefore we
= decided to define those "golden networks".  Probably we could remove the
= exemptions for the A, D and H servers, which are sitting in a /16.  We
= might consider this for a new version of the recommendation.  Our
= recommendation is just dealing with a minimum set of "golden networks"
= which of course might be extended by local decision.
=
= Still these must be exceptions resulting from strong needs - the rule
= should be to apply coordinated route flap damping throughout.
=======================================================================


>But please don't hold up this document just for this - getting the
>rest of the stuff done - with global uniform deployment of dampening
>is quite important.  [For what its worth, Verio (AS 2914) deployed
>your documented dampening parameters last week - we had been running
>dampening with the cisco defaults prior to this.]

    Hey great news, thanks !!!
    
    Regards
    CP

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