After you have purchased an AVB Card for your StudioLive AI Console, make sure to watch the video below to understand the difference between network mode changes and how to place your mixer into a "Direct Connect" mode between your two mixers. You should select from this area the "Self-Assigned" IP address mode.
After selecting that mode on each mixer, restart the devices and attempt to connect to them and test the mixer further.
a.) The section of this video discusses how to change it on an RM mixer.
b.) The section of this video discusses how to change it on a StudioLive AI mixer: