North American Network Operators Group|
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/8s and filtering
Hello, Currently APNIC's policy means that if an organization can fully use a /26 (since 25% of /24=/26 and to satisfy the multihoming requirement the organization will need to have a prefix advertised by two or more ISPs) it can get a multihoming assignment from APNIC. If Class C /8s are over and ISPs maintain their filtering policies, the bar would be raised to fully using a /24 instead (since 25% of /22 = /24 and filtering in Class A is done at /22). 8 of the 9 APNIC /8s are from the Class C space. Only one is from the Class A space. However there are only three untouched /8s left in the Class C space - 197/8, 222/8, 223/8. Actually, I wanted to know if the filtering policies will change to accommodate this - i.e. will /24s be allowed in the Class A space? I was also curious about this - if I am a customer who wants to multihome and can justify only a /24, I would go to an ISP which has an allocation from the Class C space rather than one from the Class A space. Do ISPs get to choose where the allocation comes from? Harsha.