My industrial server computer have two Ethernets (eth0, eth1) plus one Wi-Fi. We have decided to assign eth1 to be a configurable IP which will not collide with eth0. Eth0 will be 169.254.13.14 which is fixed so an engineer computer can easily connect to it and the PC will have fixed IP 169.254.13.13. The eth0 and wlan0 are in local area network (eth1 can be reached remote).
Question about Wi-Fi
Wi-Fi uses DHCP, as an access point. So it will assign wireless client IP. We plan to use 169.254.13.15 as a fixed IP for the server wlan0. So eth0 and wlan0 are on same block, same subnet. Now, will Linux/DHCP server be able to know not to assign the two addresses mentioned above to clients?
I may have multiple wireless client (PC, or tables), but only one PC will connect to the eth0. There is no other participants on eth0. Will my plan work?
I don't necessary need a routing between the eth0 and wlan0, and my software will not actually send packets across: which means, the PC on eth0 will not try to send anything to the wlan0 IP. Client on Wi-Fi will not try to send packets to the eth0, or the PC on eth0. The communication is point to point over the TCP/IP.