[ipv6-wg at ripe.net] What is a site?

 In your previous mail you wrote:

   Let me try to make most of my point somewhat more concisely:
   
   In programming, there are only three values: zero, one and many.
   
   What we need to do is come up with a good prefix size for networks that:
   
   - have no router

=> /64 for the connection link itself.

   - have one router

=> it depends on the number of links behind but it seems that /60 is right.

   - have multiple routers
   
=> if the topology is complex (HD ratio ~ 0.5)  and the number of links ~ 10
then a /56 is right.
IMHO the best is to authorize a /56 in all cases (i.e., move from /48 to /56
for common home networks) and leave DHCPv6 PD negociates the right value,
"up to" /56.

Regards

Francis.Dupont at enst-bretagne.fr