Re: I never thought of this scenario

On Wed, 10 Apr 2024 10:28:55 +0300, Tauno Voipio wrote:

To break out, get RFC2131 and read it.

Here we go <https://datatracker.ietf.org/doc/html/rfc2131>:

* Client sends out DHCPDISCOVER. The only IP address involved is the
local-net broadcast address, 255.255.255.255, which is non-routable.
* Server responds with DHCPOFFER. Since there is no IP address it can
route this response to, it, too, is non-routable.
* The client may send out ARP broadcasts to ensure nobody else has already
claimed the offered address.
* The client accepts an offered address with DHCPREQUEST, which, again, is
sent to the (non-routable) broadcast address.
* The server responds with DHCPACK or DHCPNAK.

Remember, the client’s IP stack can not be considered to be fully
operational until after all these steps have been completed.