[arin-ppml] "Leasing" of space via non-connectivity providers

Jack Bates jbates at brightok.net
Sun Feb 6 23:00:15 EST 2011

On 2/6/2011 9:47 PM, George Bonser wrote:
> It's funny, though, because in some cases I got a /24, the /25's, all 
> of the /26's, /27's, /28's, /29's, and some /30's and then all of the 
> /32's for all of the IPs in the /24!
> It was just nuts.

That's what I said of a sister company's network when their engineer 
left and I took it over. /32's for every ppp session advertised via 3 IGPs!

I did a little bit more work. I tried to make sure my scripts pulled the 
correct information, and it does look accurate, though I won't attest to 
complete accuracy. ;)

Taking the data from the overall ASN report,

28,579 ASNs were at 0.00% or 78% of the ASNs recorded. Granted, they 
only advertised 55,788 combined routes which would be 27% of the 
report's Annce total.

However, I would still stand on the premise that if the market starts 
transferring networks at the /24 level, routing table bloat would 
increase. Operators only have the choice to aggregate as much as their 
allocations allow. Networks grow over the years and IPv4 required 
multiple non-contiguous allocations. The 55,788 routes most likely will 
be a much smaller number for those 28,579 ASNs in IPv6. However, if RIRs 
had given out smaller allocations, the number would likely be much larger.

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