Multiple subnets on one Interface

[Simon Hobson]

Steve Clark <sclark at netwolves.com> wrote:

> How will dhcpd give out ips? Will it alternate? Give all of one subnet then start the other
> subnet?

The official answer is that it is not determinate - as in you cannot in any way rely on any specific allocation order.

The practical answer is that *currently* the implementation dependent order is that it will allocate unused addresses starting with the numerically highest and working down - I believe this is due to the way the internal hashing tables work. This is implementation dependent, not officially documented, and liable to change at any time without warning - if you want a specific allocation strategy then you will need to explicitly define it in the config.