... but it is obvious that it gives you errors, you cannot use the same port for two different things, despite the two different IPs assigned to the 3074, the peripheral that first accesses the port becomes the exclusive user ... and the other device will not be able to use it because it is already busy ... otherwise what use would it be to put thousands of ports on a router? it would take much, much less to work if this were the case ... use a different port for one of the peripherals and you will see that the problem does not arise!