Withdrawls and announcements attempt 2
freedman at netaxs.com
Fri Jun 21 16:47:27 UTC 1996
> A quick clarification -- the liberal BGP widthraw policy implemented by Cisco
> (and a few other vendors) only accounts for a small fraction of the ~5 million
> plus daily withdraws in the default-free Internet. The real source of all
> these spurious withdraws remains a bit of a mystery. Our data shows some
> strange sort of 30 second looping/oscilation behavior is taking place.
> Possible causes of this behavior include configuration errors, unexpected
> IGP-EGP interactions, vendor implementation bugs, and problems inherent with
> the BGP protocol itself.
> The source of the millions of BGP withdraws is NOT Cisco's "liberal BGP
> withdraw" policy -- this generates a fairly minor number of extra withdraws
> (O(n) per router), and there are a quite a few valid and compelling reasons
> for wanting implementing BGP this way.
> - Craig
What %age of the route assertions and withdrawls are substantially the same
set of routes each day?
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