@Alexandre. Thanks for the reply. It does indeed not mention 2.5G and 5G on the tech specs. But it does offers me the 2.5G choice in the menu, which is strange (see picture). I'll cross check with...

@Rafou Additional information : my switch is setup on automatic speed negociation and the Deco are working in Access Point mode.

I have a switch Unifi USW-Pro-48 which has 4 SFP+ (10 Gbps) ports, equipped with SFP+ module (compliant with 10 Gbps speed). While connecting my BE25 on those ports, with cat. 7 RJ45 cables, it only...