So, I recently managed to snag a SoYouStart dedicated server. It comes with 16 IPs, but configuring more than the main IP (ie, "failover" IPs) is definitely not trivial. I used my dedicated server for hosting my own VMs with Proxmox, so I definitely needed to use these extra IPs.
I couldn't find any good way to configure a failover IP configuration in Arch Linux, so I scrounged around and ended up following directions mostly from the FreeBSD instructions, but adapted for Arch.
Here's how I did it
[earlz@test2 ~]$ cat /etc/netctl/virtnetwork Description='A more versatile static ethernet connection' Interface=ens18 Connection=ethernet IP=static # Any valid iproute command can be placed in this array IPCustom=('addr add FAIL.OVER.IP/32 dev ens18' 'route add PRIMARY.IP dev ens18' 'route add default via PRIMARY.IP') DNS=('126.96.36.199')
Replace FAIL.OVER.IP with the appropriate failover IP(ie, the extra IPs). Replace PRIMARY.IP with your main IP, but change it to end with 254.
I'm sure there is a better way to do this, but eh. close enough for me