I have new 2Gbps Optical Fiber Internet service.  I would like to port 2 of the router ports over to my TP-Link TL-SG1016DE ver 2 switch. It appears "Trunking" and "LAG" are interchangeable terms.  My switch has a Trunking tab, but I can't find "LAG" anywhere. 

I configured Trunking with only port 16 connected to the router, with Trunking on Trunk #1 containing Ports 15 & 16.  When I connect port 15 to the router, I lose Internet access everywhere on my network.  NOTE that the fiber internet provider provides only rudimentary access to configuration in the router... I cannot access any port or orther advanced configuration...Does the router have to have the 2 ports Trunked / LAGed to match the switch end configuration?