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Re: RIPE "Golden Networks" Document ID - 229/210/178
--On 02 September 2004 16:09 -0700 John Bender <johnbender@xxxxxxxxxxxxx> wrote:
This would not be as problematic if dampening could be applied to a path rather than a prefix, since an alternate could then be selected. But since this would require modifications to core aspects of BGP (and additional memory and processor requirements) it does not seem a likely solution.
So returning to the illustration Rodney gave Randy about the .foo domain, are we saying that if the .foo domain's DNS is anycast, then as (just from statistics of multiple paths) prefix flaps (as opposed to flaps of individual paths) are going to be more likely [*], route dampening adversely affects such (anycast) sources more than straight unicast?
Or, looking at it the other way around, if in a heavily plural anycast domain prefix route changes (as opposed to route changes of individual paths) are more common than "normal" routes [*] (albeit without - dampening aside - affecting reachability), does this mean route dampening disproportionately harms such routes?
i.e. is the answer to Randy "because such networks [might] have a higher tendency to use anycast.
* = note untested assumption