DHCP-Setup to serve two networks

[Simon Hobson]

Oliver Emslers wrote:

>thanks for you answer. I do understand they way of prepolulating the 
>leases-file, but that's not an option for us in terms of doing this 
>on some hundreds of servers. What do you think about the approach of 
>doing this mac-address-based like this:
>
>class "ppp0" {
>  match if substring (hardware, 6, 1) = 00;
>  match if substring (hardware, 6, 1) = 02;
>  [...]
>}
>
>class "ppp1" {
>  match if substring (hardware, 6, 1) = 01;
>  match if substring (hardware, 6, 1) = 03;
>  [...]
>}
>
>subnet 87.1.1.0 netmask 255.255.255.128 {
>  pool {
>  allow members of "ppp0";
>  range 87.1.1.1 87.1.1.125;
>  option routers 87.1.1.126;
>  }
>}
>
>subnet 87.2.2.0 netmask 255.255.255.128 {
>  pool {
>  allow members of "ppp1";
>  range 87.2.2.1 87.2.2.125;
>  option routers 87.2.2.126;
>  }
>}
>
>there should be quite a good chance of equalizing the two networks 
>from a ip-based point of view ... I have to check this out ... ;-)

That should do it. I would suggest that you keep an eye on the pools, 
and once they are almost empty of unused address, remove the classing.