@David-TP thank you David.. I connected it to my satellite deco and the switch worked as expected .. I then tried it again with the same cables on the Main deco and this time it worked .. no idea why...

HI Recently purchased ax3000 x50 deco mesh, and i need to expand the number of ethernet ports .. so i bought a tp-link ls108G unmanaged switch. (8 port) Everytime i plug the switch into the deco ,...