Linux source address selection vs. EUI-64

Eugen Leitl eugen at
Sat Nov 13 16:32:25 CET 2010

On Sat, Nov 13, 2010 at 03:36:57PM +0100, Geert Hendrickx wrote:

> For individual hosts (esp. in a VPS environment), assigning a /64 or
> larger makes little sense to me, a /96 is more than enough.

Is that an official recommendation? I currently have a single /56,
which I would like to distribute over several thousands customers,
each on a virtual server, with currently one static IPv4 address.

I can see how a /96 for each customer would be more than enough
(especially that since hundreds of customers are going to share
the same MAC, due to the low-overhead virtualization technology

Presumably, in above context it would be a sane thing to parcel 
the /56 into /64, each for one physical server's distinct NIC 
MAC, and from each /64 a /96 for each virtual server?

Eugen* Leitl <a href="">leitl</a>
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