[mieses]

The use case is `ssh shortname` or `ssh shortname.lan` to a laptop on the same local network regardless whether the wired or wireless interface of the laptop is active.

An overlay like Tailscale MagicDNS might solve this but is complex.

Assigning the same name to 2 IP's (round robin DNS) will mean having to retry the ssh connection if the IP of the inactive interface is returned.

Failover bonding (mode 1) of the wireless and wired interfaces with MAC address spoofing so that the bonded interface maintains a consistent MAC address is reportedly not always supported by WiFi hardware and standards. Bonding may require manual reconfiguration when the laptop moves from the local network where "shortname" is used to an arbitrary WiFi network like airport or coffee shop.

Are there any solutions that satisfy single IP and reliable WiFi at the same time?

Linux used to be able to move the same IP between 2 interfaces depending on which was active. But it looks like advancements in Linux networking have killed this simple solution.