North American Network Operators Group|
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Re: How Not to Multihome
On Mon, 08 Oct 2007 21:32:50 EDT, "Patrick W. Gilmore" said: > On Oct 8, 2007, at 6:45 PM, Justin M. Streiner wrote: > > I never said it was. My experience, both in my previous life as > > the operator of a regional ISP and since then in other capacities > > is that having disjoint origins for a chunk of some provider's > > address space is basically asking for trouble, and it's the kind of > > trouble that may ony pop up when something breaks. > > I'm afraid your experience is not the same as many, many people. > > There are currently ~1500 prefixes with inconsistent origin AS. > These are trivially identifiable: > > <http://www.cymru.com/BGP/incon_asn_list.html> > > Some of them are obvious mistakes (I doubt HKSuper is supposed to > originate 4/8). But many of them are not, and the Internet works > just fine. And as Justin said, some sizable fraction of those 1500 prefixes are quite possibly *appearing* to Work Just Fine currently, but if something breaks, that will be 1500 NOC monkeys facing some difficult-to-debug routing issues....