Re: I never thought of this scenario

On 20/04/2024 21:31, Rich wrote:

Exclusive of
"deep packet inspection" a router is routing packets by looking at the
IP header of that packet, not looking inside the IP packet's payload
for HTTP/NNTP/DHCP/etc.  contents and routing based on those contents.

Not at all true in the case of address translation, routing protocols, traffic shaping and the like.
The only thing that caries is how *much* of the packet you inspect.
DHCP is similar in that the on;y thing a router has to do is determine its a UDP broadcast, and if it is, work out where to send it, and what return address to give it if any..
One would expect the router to simply spoof a MAC address on its interface, and relay responses to that MAC address back to the client network.
In short its acting like an ethernet switch or bridge
I am more curious as to how the DHCP server 'knows' which network address to give the client, but not interested enough to look it up. :-)
--
Climate is what you expect but weather is what you get.
Mark Twain