How to keep 2 identical IP addresses on the same network and make it work (temporary)

This comment was posted to reddit on Mar 21, 2023 at 5:28 pm and was deleted within 1 day, 1 hour(s) and 59 minutes.

So I have started working on this but hit an unexpected hurdle dealing with this thing.

Robots are in VLAN 8 - 172.50.8.0/24

PCs are in VLAN 3 - 172.50.3.0/24

Router is now between the switch and the robot;

Router Interface eth1 to the switch has an IP in the PC subnet; All good.

Router Interface eth2 to the robot has the robot's default gateway set as IP.

Both interfaces appear as connected.

I can't simply ping the robot's IP even from the router itself. I tried pinging from eth2 but still nothing.

On eth2 I get Tx bytes from time to time but nothing on Rx.

Does it make any sense?

/r/networking Thread Parent