Re: Route Flap Damping: Harmful ?

[Zhuoqing Morley Mao <]

Hi Tony,

> 5) Section 7 of http://www.cs.berkeley.edu/~zmao/Papers/sig02.pdf
> 'Selective Route Flap Damping' makes some really interesting proposals that
> sound promising.  There is some similarity with my point 3 above, and it
> contains some potential alluding to the long forgotten transitive attribute
> DPA that never got off the ground.
> I particularly like i) Only treat withdraws as bad events and ii) wait
> until the next announce before triggering further penalties.  For the
> authors, would these alterations alone to the damping spec have a large
> positive affect on the overall stabiulity of BGP systems ?

To answer your question, I believe this proposal would reduce the
likelihood of suppressing routes due to a single originating withdrawal.
However, from the BGP Beacon experiments we are conducting, (where we have
controlled originating withdrawal and announcement) we have also observed
that a single withdrawal has caused alternating announcement and
withdrawal messages.  We plan to quantify the impact of this proposal,
once we obtain more data.

Thanks.

--Morley