North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: FW: /8s and filtering
On Tue, Dec 10, 2002 at 12:45:42PM -0800, Harsha Narayan wrote: > > 2) Small multihomers must get the ISP that assigns them address space to > > allocate them at least a /24 (with multihoming as the justification if > > needed). The ISP must agree to allow them to advertise their allocation > > through other providers and must agree to hear and announce the block from > > the customer *and* *other* *ISPs*. > > > Hello, > Doesn't this mean that unless filtering policies change, after Class C > space is used up, the multihomer will have to get a /22 from the ISP > (since after Class C gets used up allocations will be made from Class A > space). There are only three /8s left in the Class C space. To be accepted into Verio's space per the URL that [email protected] pasted... you are correct. I still think this is a rare method of filtering... and perhaps Verio will change their policy to be /24 everywhere once the Classfull C ranges are gone. As others have mentioned... not all providers filter in the same way, and sometimes the methods are not published..... Its relatively safe to make a *vague* judgement that a /24 will get you reachable via *most* of the net. -- ,N ~Nathan - routing & switching dude/fly-boy/sport biker - San Jose CA~
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