Didn't have to buy a new NIC. Just tested by changing my MAC address by +1. Now both LAG members are being utilised.

I have just arrived at the same question when I found that all traffic was going via one member in one of my tests.I have a Synology 1511+ using LAG (LACP) to SLM2008 with two PCs (non LAG) transmitting. I tried changing one of the IP address but mad...