"Already have host" - Multiple SNMP at one address


I’ve got problem when adding new device which is on the same router with port forwarding.
LibreNMS (
Router (,
Printer1 ( port redirect ->
Printer2 ( port redirect ->

When adding second printer port 10102 I’ve got message “Already have host” how can I fix this issue?

Best regards


You should be able to check the “Force add - No ICMP or SNMP checks performed” and add the host.


Thanks for reply. I’ve got the same message: Already have host
Tested on version 559a221 - Thu Mar 16 2017 19:52:23 GMT+0100

solved using domain based entry
192-168-1-101-10100.example.com A
192-168-1-101-10102.example.com A