Assign IP based on Ethernet port number connected

RouterOS General
1

Hi,

I’d like to set up a DHCP server on a Mikrotik device which assigns an IP address based on which Ethernet interface the device is connected to. Which RB models support this, and how would I configure this?

For example, say I had an RB493 (8 ports) running RouterOS. I’d like to configure so that any device plugged into port 1 is assigned 192.168.87.1, any device plugged into port 2 is assigned 192.168.87.2, and so on..

Thanks!

2

if you are going to connect only 1 device, then you can do this by creating dhcp-server on each interface and assign pool you like to the dhcp-server. Pool can be only 1 address big.

3

Great, thanks. Yes, we will only be connecting one device per port. Cables will be routed from the router to slots in a rack, and the idea is to know which cable, and therefore which slot in the rack, a device is plugged into.

4

One more question. In another test setup, we’d like to assign IP addresses based on the last octet of the MAC address.

For example, for any MAC address xx-xx-xx-xx-xx-1A, assign 192.168.87.26 (26 == 0x1A).

Is that possible, and if so how?