You can try and bring both modem and
router in same ip range. Check with below settings:-
1. Switch off both modem (ONU) and router(
Netlink).
2. Switch on modem and connect via lan and disable DHCP and change the ip of modem to 192.168.0.2, ensure modem is in bridge mode before doing that.
3. Connect modem and router via LAN. Modem 1gig port to router’s WAN port.
3. Switch on router and in DHCP server check for DHCP if it’s assigning ip from 192.168.0.2 or from .100, if assigning from 0.2 change it to start from 0.3.
That’s it.
Now 0.1 router will open and 0.2 modem page will open.