Wanted to put internet access point in another room so bought two SG108's.  Configuration is SB8200 modem plugged into Eero router plugged into SG108 then Cat 6 cable ran into other room plugged into second SG108 and TV plugged into that SG108.   Plugged TV into that one and although the switch light is green I only get about 15MB speed when cable speed from router is 200MB.  I ordered another 100ft cable in case the one I bought was faulty but if anyone has any other troubleshooting tips I'd love to hear them.