Following your advice I have determined that the network in question e50ff198-0fb5-4fd4-9b6c-d2f4b0a3f575 is an external network on which there are no float IPs. Or at least, no spare ones. This is actually by design in my case.
I can add IPs to aide migration. I'm reading in here that external gateway router SNAT IPs change as part of this migration?
Following your advice I have determined that the network in question e50ff198- 0fb5-4fd4- 9b6c-d2f4b0a3f5 75 is an external network on which there are no float IPs. Or at least, no spare ones. This is actually by design in my case.
I can add IPs to aide migration. I'm reading in here that external gateway router SNAT IPs change as part of this migration?