North American Network Operators Group

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Re: v6 subnet size for DSL & leased line customers

  • From: Iljitsch van Beijnum
  • Date: Tue Jan 01 07:00:09 2008


On 31 dec 2007, at 1:24, Mark Smith wrote:


Another idea would be to give each non-/48 customer the
first /56 out of each /48.

Right, so you combine the downsides of both approaches.


It doesn't work when ARIN does it:

* 24.122.32.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.48.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.64.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.80.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.96.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.112.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.128.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.144.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.160.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.176.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.192.0/19 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.224.0/20 4.68.1.166 0 0 3356 6453 11290 i
* 24.122.240.0/20 4.68.1.166 0 0 3356 6453 11290 i


And it's unlikely to work here: for those standard size blocks, you really don't want any per-user config: you want those to be assigned automatically. But for the /48s you do need per-user config, if only that this user gets a /48. So these two block sizes can't realistically come from the same (sub-) range.