I've been looking for information regarding LAG/LACP configuration and the impact on QoS (such as packet delay, out of order delivery, etc.). I could only find statements such as "LAG/LACP guarantees same 'flow' QoS" - what exactly is flow? Which packets are part of the same flow and which packets aren't? Is "flow" guaranteed to be transmitted via the same physical link of the LAG?
Should I consider employing a specific hash method for a specific service? For example, would I use src & dst MAC for some services and src & dst IP for others?