v6 subnet size for DSL & leased line customers

Iljitsch van Beijnum iljitsch at muada.com
Tue Jan 1 11:57:17 UTC 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.



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