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Re: How big a network is routed these days?
On 17-Jan-2007, at 12:43, Marshall Eubanks wrote:
On Jan 17, 2007, at 12:19 PM, David Freedman wrote:
The RIRs all have different policies, and anybody interested in finding out the rules for any individual RIR are best advised to consult the policy documents published by the RIR in question directly. The original question in this thread (that of reachability of addresses covered by long-prefix announcements) is profoundly on- topic here, however, and explicitly disclaimed by all the RIRs last time I checked.
For the ARIN region, the Number Resource Policy Manual currently published at <http://www.arin.net/> mentions the following minima:
22.214.171.124 Single Connection
As far as I know, all of the PI /24's are thus "legacy" in nature.
As the above snippet from the policy manual suggests (and as my experience confirms) there are recent assignments made to end users by ARIN under the micro-allocation policy which were made with the expectation that individual /24s would be advertised globally. Clearly these are not the most usual case, as the description of those who qualify for such assignments above indicates, but it would be a mistake to assume that *all* /24 assignments are legacy.
From my experience, /24's and longer assigned by RIRs likely to be routed, as well as ones from the old class C space, and people have mostly had problems with /24 PA space in the old Class A and B space.
I'm not aware of widespread filtering of /24s based on assignment boundaries in recent years. Can anybody confirm whether this is still a real problem?
The real problem today, I thought, was that of allocations or assignments being made from fresh /8s that still feature in peoples' bogon filters.