How to set repeater to use the same ip range of the main router?

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi Everyone,

I'm trying to set a repeater (Comfast CF-WR750AC) to use the same ip range as the main router (Archer C7 + LEDE Reboot SNAPSHOT r3969-8322dba029 / LuCI Master (git-17.103.24187-a82ca22), so devices connected to the repeater will stay on the same Network.

From what I understand I should disable the DHCP server on the repeater and set the repeater ip as one in the ip range of the main router, but when doing so I don't have access to the repeater anymore and I need to reset to factory default.

Please advice on how to set it up correctly so everything will stay on the same network.

Thanks.

2

Just connect the two devices wired via their LAN ports. Do not use WAN port on the repeater.

Advice e.g. in https://forum.openwrt.org/viewtopic.php?pid=340068#p340068

No sure how configurable your Comcast repeater is...

3

I should have mention before the repeater connect via wifi not wired. I assume I can reserve an ip not in the ip range of the router DHCP server but still under the same frame, but I don't know how to do it in LEDE.

Example:
DHCP server range 192.168.1.0/249
Repeater static ip 192.168.1.250 with DHCP server disable.

Can I achieve this somehow ?

The end goal is using the repeater wireless way and keep devices connected to it on the same LAN.

Thanks.