RB1100AH vs 1Gbps to Huawei GPon gateway

Hello,
I wish to connect my RB1100AH to a Huawei GPon residental gateway, what gives me 120mbps connection.
Sadly, the residental gateway have no option for fixing port speed, and don’t want to sync, just with 100mbps.
Even if i set auto-negotiation=off on RB1100AH.
I’ve tried the 5x switchgroup, port11,12 and 13 as well, with no luck.
Tried ROS5.25 and ROS6.2 too.

RB110AHx2 works well. now what to do?

ps: i tried to put an RB250GS between, that’s linked 1G with the resi.gateway and 100mbps to the RB1100AH…

sorry, seems to be cable fault :frowning: