no that doesn't work at all sorry
the modem box interface is 192.168.1.254
I tried with the router in 192.168.2.1 and in 192.168.1.1 I have internet but I cannot access the interface of my box to create and open the ports (dmz)
in ip I have this address I don't know why in overview
192.168.1.55/24
I resume it is like that
modem router bbox + first cpl / second floor + cpl + openwrt router
may be an ip conflict
If you followed mk24's suggestion
Your ISP provided device should function only as a modem.
I would like to deactivate the function but impossible,
there is no bridge mode as in many countries on this bbox it is required to make a modem router
I would set up the topology as
ISP device > OpenWrt device > powerline 1 > powerline 2 > ps5
If the ISP device has no bridge mode you will need a second separate IPv4 range for the OpenWrt LAN. You can try something like 10.9.8.0/24
ok so isp device -> router openwrt -> cpl 1 on the ground floor -> cpl 2 floor -> ps5
the ethernet cable of the cpl1 I connect it to the isp peripheral or to the openwrt router?
To the OpenWrt router. The ISP device connects to OpenWrt WAN
and the router openwrt "lan" to first cpl ethernet ? then just a second floor connect to cpl 2 the console and pc ?
my router openwrt will make have do wich lan ip ?
it's correct ? i will retry tomorrow thanks so much
The OpenWrt LAN can be any IP other than 192.168.1.X. 192.168.2.1 is suggested, or anything in the 10.0.0.0 range. The OpenWrt WAN will have a 192.168.1.X IP to link to the modem.
Don't let any device connect directly to the modem except the OpenWrt router. Turn off the wifi in the modem if you can.
bbox + powerline + 2nd powrerline + router openwrt
this solution is possible you think for just ps5 and pc ?
i' use chrome i will test with edge because chrome can cause an error dns i saw
Yes you can put the powerline link on either side of the OpenWrt router. Placing the OpenWrt router upstairs may have better wifi coverage.
If you can't disable routing at least disable wifi. You can't have any devices connecting directly to the ISP other than openwrt
ok thanks for the response everybody
this is the screen of my first intention
This can work, as long as the powerline stuff works well. Make sure you set up SQM based on tests from a machine on OpenWrt LAN
i would use your script 
the cpl is netgear plp2000
Yes or script, but set speeds based on tests from the LAN
Hello everybody so i have put the routeur in the bix i have make a dmz to the router and i have a nat open
But my ping is over 20 ms before and i have packet loss
Why you think
Just enabled dmz and static in bbox
Run your speed tests and set your speeds correctly
ok i think have found the solution grace to the thread
http://jelnet.online.fr/jlnt_bou2.htm#:~:text=Le%20routage%20doit%20normalement%20être,ou%20non)%20le%20serveur%20DHCP.
the bbox has a option route static
the bbox has a interface server to 192.168.1.254
the router has a 192.168.2.1
the overview in openwrt is the next
protocol dhcp
adress192.168.1.55
gateway 192.168.1.254
dns 192.168.1.254
if i understand i make a routage static to bbox with ip destination ? 192.168.1.55 it's right
https://forum.bouyguestelecom.fr/questions/1211219-ecrire-route-statique-box
thanks for response by advance
he has a sthread too in the forum
@vgaetera you can help me you maybe ? thanks
