On Jan 4, 2023, at 2:32 PM, William Herrin <[email protected]> wrote: > However, since /48 is also the minimum Internet routable size,
Sorry, what? Out of 172,457 IPv6 prefixes seen at AMSIX (according to routeviews) on 2023-01-01, counts of prefixes longer than 48: 49: 53 50: 9 51: 2 52: 41 54: 2 55: 1 56: 334 57: 1 58: 28 60: 5 61: 1 63: 3 64: 1309 112: 3 120: 9 123: 1 124: 6 125: 14 126: 107 127: 24 128: 102 As far as I know, there is no such thing as “the minimum Internet routable size”. There is likely something that could be characterized as a probability function that describes the likelihood that a routing announcement will propagate that correlates with prefix length, but it is entirely dependent on local policy. Regards, -drc
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