So I have an existing HA device. Working fine. Added an additional 1gb link to use as a heartbeat link. I manually added the IP addresses to the replication interface, and when I hit "Okay", it accepted them without error. But the link would show as down with a red X if I clicked on either HA device in the GUI. After scratching my head for a bit, my brain caught up with my eyes, and noticed I had switched the IP addresses
How about having that particular screen verify the IP address is a valid IP on that host, and reject it right away if invalid?