Re: [Qemu-devel] Making qemu use 10.0.3.x not 10.0.2.x

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> Using a (once) randomly-chosen default greatly reduces the odds of
> that happening.  Many many people foolishly choose 10.0.{0,1,2,3}.x.
> Many fewer choose (say) 172.30.206.x.  So the fixed qemu default
> should be 172.30.206.x, or some other range also chosen at random.

A few years back I've worked for a web company, wrote the border router
firewall rules, had some rules in there to catch packages with
rfc1918-private addresses in public network.  Watching the statistics
showed that the 172.16/12 range was _much_ less used than 10/8 and
192.168/16.

I think 10/8 to be used by companies alot.  192.168.$smallnumber.0/24
seems to be a quite common default for DSL routers and the like.

Thus picking a random /24 network from 172.16/12 as new default value
has a pretty good chance to vastly reduce the number of clashes with
existing setups.

HTH,
  Gerd

-- 
http://kraxel.fedorapeople.org/xenner/