I know why you’re here. It’s a pain isn’t it?
Let’s get this sorted for you (and me sometime in the future!).
* You have attached your failover IPs to the server
* You have generated a MAC address for the failover IP (02:xx:xx:xx:xx:xx)
You will need the failover IP (the one below is an example)
Here is my configuration:
# This is the network config written by 'subiquity' network: ethernets: ens18: addresses: - 192.168.0.20/24 gateway4: 192.168.0.254 nameservers: addresses: - 22.214.171.124 - 126.96.36.199 search: - virtual version: 2
As you can see, I just changed the /32 to /24 and changed the last octet of the gateway4 from 120 to 254.
The key is the /24 part. If you leave it as /32 it thinks the gateway is on a separate network.
This does work with real OVH failover addresses, I only used the internal network address 192.168 as an example.