[Phunkie]

Hi, I’ll try to keep it short. I have one main router that is provided by the ISP and one DDWRT router.
Situation right now:
Main router. Some devices (phones, tablet, NAS, TV box, DDWRT router etc) connected on this router. IP range 192.168.0.x
DDWRT router connected wired to the main router and set as a regular router with DHCP enabled. IP range 192.168.1.x. On this range I have my main computer connected with wire.

Situation I would like:
Same as above but everything in one subnet.

I believe I need to configure DDWRT in WAP mode so I followed this guide:
https://www.dd-wrt.com/wiki/index.php/Wireless_Access_Point#How_To_Use_DHCP_to_Set_the_WAP.27s_IP_Address

The result is strange behavior but essentially nothing works really. No internet no LAN. I’ve done it several times now and sometimes it works for a while, sometimes it works until I reboot my computer. For example yesterday evening everything was working but when I booted my computer this morning it started going bad again. And when it worked, the main router even shows all devices configured properly with the correct IP’s.

I tried 2 different variations because they are not very clear to me:

1. "Local IP Address: 192.168.1.2 (i.e. different from primary router and out of primary router's DHCP pool)"
This guide says the static IP should not be in the main router’s DHCP pool. Does it mean it should be in the same subnet but not an IP the main router COULD assign? Or does it mean it should not even be in the same subnet?
Some posts/texts say it should be in the same subnet and also should be an IP from the dhcp pool, that it just needs one that is not assigned yet. Which one is it? Right now I configured mine 192.168.0.2, which is a free IP in my main router’s LAN. But it’s not working.
I also tried 192.168.1.2 (other subnet) but that didn’t work either.

2. Use WAN port or not for the wired connection to the main router. (WAN disabled in DDWRT as suggested in guide)
Tried both and for example yesterday my last attempt was using the WAN port which worked for the rest of the evening but this morning when booting my computer nothing worked anymore.
Also using the LAN port (right now for example) it’s not working.

I should mention that when I say it's not working, really nothing works anymore. Even the main router has problems.

I’m at work right now and cannot post screenshots of my configuration, will do this evening if necessary, all though I’m probably going to reset it again cause it’s not working. But perhaps someone could clarify the 2 points and maybe give some ideas? Maybe tell me if it should be working or not under these circumstances?

Sorry for long post

[ian5142]

1. If you are assigning a static IP to the dd-wrt router, make sure it is in the same subnet as the ISP router (192.168.0.X). You need to make sure that the ISP router is only handing out so many addresses, somewhere less than 255. Some routers only, like dd-wrt start assigning DHCP addresses at *.100 for 50 addresses, others are different. Check your ISP router's DHCP settings.

In dd-wrt set your local IP to 192.168.0.X (where X is outside the DHCP range). Subnet mask 255.255.255.0. Gateway and local DNS should be set to 192.168.0.1. Disable DHCP on the dd-wrt router.

2. If the connection is set to disabled at the top of the setup page, click save or apply. Then look for a Assign WAN port to Switch tickbox, check it, click Apply. Now it does not matter what port you have it in. The WAN port will act just like any other LAN port. I plug my WAP in the WAN port still because then it is easier to trace the LAN cords back to the ISP modem/router.