How to access modem that is in bridge mode from a router connected to it?

[vacatedzeus2]

I have a normal ftth modem (it is branded as uniway however its running Netlink firmware) which is in bridge mode. I have connected my TP-Link archer ac2600 to it in port 2. Everything is working fine. Is there any way to access the netlink modem's gui from tp link?

 

[drtech]

Yes, it is indeed possible ! I use this exact setup to monitor my optical power and line quality without the need to unplug and replug connections again and again.

1. Inspect your ONU. Specifically, look for the default management IP. Then set your computer in a similar range. For example, I connected my computer to my router directly and set a static IP on my LAN adapter as 192.168.101.100 and verified that I can access the WebUI.
If you cannot access the webUI, there's no point in going further since most probably your ISP has locked your router (you can try resetting it in case someone else changed the default IP).

2. Now connect back everything as it was (ONU>ROUTER>PC). Set your adapter to Dynamic IP again. Next, open your router UI and go to WAN settings. Scroll down under PPPoE until you find something like "Secondary Connection". Select "Static IP". Fill in the same details you filled on your LAN adapter while accessing the webUI of the ONU.

3. Save settings, Reboot Router.
4. Try visiting 192.168.101.1 (or whatever your ONU is at). It should load up the ONU page.

 

[WandereR]

I enabled DHCP on my ONU and after that I have set up a Dynamic IPv4 along with the PPPoE for accessing both the router's admin as well as the ONU's admin.

 

[drtech]

Dynamic IPv4 along with the PPPoE

If your LAN and WAN is not properly isolated (in firmware), this can result in DHCP leaking out IP addresses on LAN, hence is discouraged.
(Happens more often than you might guess, specially in bridge mode on cheap ONUs.)

 

[vacatedzeus2]

Thanks @drtech. I'll try it out over the weekend. My ONU's management console is at 192.168.1.1 and my router is at 192.168.0.1. These are different subnets, correct? So will that solution work here?

 

[drtech]

My ONU's management console is at 192.168.1.1 and my router is at 192.168.0.1

@vacatedzeus2 Subnets are not decided by IPs, but instead by subnet masks (like 255.255.255.0 or 24).
Make sure that the subnet mask on both ONU and TP-Link is 255.255.255.0 (most probably they are), which will make .0.1 and 1.1 different IP ranges.

 

[vacatedzeus2]

oh alright, I'll try it out and see

 

[ayushgupta99]

Syrotech bridge mode

 

[vacatedzeus2]

Thanks guys, it worked.

 

[armaan_99]

Which router you use?