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Thread Index [isp-bgp] Re: Route Flap Damping
S> Date: Thu, 10 Apr 2003 11:45:21 +0530
S> From: Sakthivadivu.S.S
S> Is it possible to implement Route Flap Damping using integer
S> arithmetic?.If anybody has implemented this, please give me
S> the solution.
This question confuses me. Are you hinting at implementing BGP
for a processor that lacks FPU? If so, the answer is "yes, but
it might take a bit of work".
Due to the exponential decay nature of flap dampening, you'd
probably want to add/subtract/multiply the logarithms of your
intended quantities rather than the numbers themselves.
For instance,
log (A * B) = (log A) + (log B)
log (A ^ B) = B * (log A)
come in handy.
Off the top of my head, I'd probably work in base 2 log using a
combination of fixed-point arithmetic, lookup tables, and
iterative routines.
Or am I way off in guessing what you want to do?
Eddy
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