Migrations and Floating IP's

No, I did not try that as I was caught off guard by this issue and had a very small window to troubleshoot and had to undo my changes. I am now trying to determine why this happened and what I can do to prevent it when I try again. Still leaning towards an issue related to ARP cache as I don't know how else to explain the behavior. I wish I had tried the command to see the outcome. I did attempt to failover the new 11.x nodes once they had the new floating ip addresses configured but I guess that would not give the same results as running the sys config command?