It looks like the deep linking to the LCU page doesn't work (you have to click the tab for Network Load Balancer), so here's what an LCU is from that page: ---

It looks like the deep linking to the LCU page doesn't work (you have to click the tab for Network Load Balancer), so here's what an LCU is from that page: --- An LCU is a new metric for determining how you pay for a Network Load Balancer. An LCU defines the maximum resource consumed in any one of the dimensions (new connections/flows, active connections/flows, and bandwidth) the Network Load Balancer processes your traffic.