First draft of the European Template for IP number requests

 "Peter Koch" <pmk at deins.informatik.uni-dortmund.de> writes:
  * 
  * Marten.Terpstra at ripe.net writes:
  * 
  * >  Havard.Eidnes at runit.sintef.no writes:
  * 
  * [...]
  * If you have the need for two large subnets, you have to use a mask of 2:6
  * (see below). This is bad, we have in some cases seen subnets of size 50-70 
  * and
  * then had to assign one C address for each of them.
  * 
  * If you actually use subnetting 3:5, you have 2^3-2=6 subnets with
  * 2^5-2=30 hosts each. You have a maximum of 180 hosts here (router(s) not ta
  * ken
  * into account), an unsubnetted network would offer 254, so this is about 71 
  * %.
  * 
  * Looking at all possible subnet masks, you get:
  * 
  * subnet mask  |  # subnets | # hosts/subnet | total # hosts | usage
  * -------------+------------+----------------+---------------+------
  *     1:7      | not allowed|		   |		   |
  *     2:6      |      2     |      62 	   |	 124	   | 49 %
  *     3:5      |	    6	  |	 30	   |	 180	   | 71 %
  *     4:4      |	   14	  |	 14	   |	 196	   | 77 %
  *     5:3      |	   30	  |	  6	   |	 180	   | 71 %
  *     6:2	     |	   62	  |	  2	   |	 124	   | 49 %
  *     7:1      | not allowed|		   |		   |
  * 
  * Percentage is nothing to worry about too much.
  * More address space would be wasted if you would assign a full class C net
  * for every subnet the requestor operates.

Sorry about my fantastic calculations. You are of course right. I'll make
sure I get some more coffee next time ;-)

  *  Peter

-Marten