Prop-033-v001: End site allocation policy for IPv6 Policy SIG APNIC 22 Randy Bush, Geoff Huston.

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Presentation transcript:

Prop-033-v001: End site allocation policy for IPv6 Policy SIG APNIC 22 Randy Bush, Geoff Huston

The Proposal Change existing policy to remove the default use of a /48 for end site allocations as they were too prescriptive Propose that the end site allocation size be a matter for LIR or ISP determination As the HD ratio requires a prefix length for the calculation to work, measure utilization efficiency for subsequent allocations using a hypothetical /56 allocation unit

Impact End Users –The size of an end site assignment is a local decision for the LIR or ISP to make, using a longest prefix value of a /64 ISPs and NIRs –ISPs and LIRs may choose whether they make changes to their procedures for assigning address blocks to end sites APNIC –Subsequent allocations to the LIR or ISP will be based on an address utilization calculation using a threshold HD Ratio value 0.94 with a hypothetical allocation unit of a /56

Calculation of HD Ratio For each end site allocation convert the allocation size into equivalent /56 units: Each /48 end site = 256 x /56 units Each /52 end site = 16 x /56 units Each /56 end site = 1 x /56 units Each /60 end site = 1/16 x /56 units Each /64 end site = 1/256 x /56 units

Calculation of HD Ratio The HD ratio threshold is then calculated: HD = log(/56 units allocated) / log (16,777,216) 0.94 = 6,183,533 x /56 units

Examples 1.An ISP uses only /48 end site allocations 0.94 HD = 24,154 x /48 end site allocations 2.An ISP uses only /56 end site allocations 0.94 HD = 6,183,533 x /56 end site allocations 3.An ISP uses only /60 end site allocations 0.94 HD = 98,936,532 x /60 end site allocations

Examples (cont) 4.An ISP uses a mix of /48, /56 and /60 end site allocations: 8,000 x /48 end site allocations, plus 80,000 x /52 end site allocations, plus 3,000,000 x /56 end site allocations = 6,328,000 x /56 unit equivalents = 0.94 HD ratio

Summary End Site allocation is a matter for LIR / ISP to determine HD ratio calculation is based on /56 unit equivalents