At 12:36 PM 5/15/98 PDT, Mark D. Nagel wrote:
One of our customers was recently allocated a /20 netblock from ARIN. I had just been ass-u-ming it was a /19 until I cross-checked our announcement update with the request from the customer. Is this a change in policy (I thought they only allocated /19 or bigger) or did I miss something? If the former, are NSPs like Sprint planning to update filters to route these new smaller blocks?
Check the ARIN page, http://www.arin.net/initial-isp.html. Essentially, ARIN allocates a /21 or /20 of a "Reserved" /19. When our downstream got a /19 from ARIN, he announced the full /19 to defeat the Draconian Sprint 112 filters and copy-cats. Check with your downstream. They probably have a reserved /19 they can announce. And, of course, double-check with ARIN as this isn't my customer we're talking about. ;)
Mark D. Nagel <nagel@intelenet.net>, CCIE #3177
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