Subj : OpenBSD and SLAAC
To   : Michiel van der Vlist
From : Markus Reschke
Date : Mon Mar 19 2018 14:40:26

Hi Michiel!

Mar 18 22:34 2018, Michiel van der Vlist wrote to Markus Reschke:

 MvdV> I have mixed feelings about this.

 MvdV> + It allows more flexibility. For example if your ISP just gives 
 MvdV> you one /64, you can still have multiple subnets. E.g by cutting 
 MvdV> the /64 in 65536 /80s. Should be enough for everyone.

Another good point is the subnetting for PtP links. A link between two routers doesn't need SLAAC and a /64. All your links would fit in a /64 easily. There are several papers discussing the usage of much longer prefixes like /128.

 MvdV> - The providers can use this as an argument to just give you one 
 MvdV> /64.

I don't think so. There are too much devices supporting only /64 with SLAAC. And OpenBSD isn't a widespread OS for end users.

ciao,
Markus

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