Sharing Time Machine disk in 10.11?

[toke lahti]

Since there's no this option in 10.11: "Share as a Time Machine...",
is it not possible to share a local time machine disk to another mac?

The mac that would use the shared Time Machine disk has 10.15.

 

[toke lahti]

Should I disable AFP from "host" mac which has 10.11)?
Should I share in Preferences->Share the whole disk or just the "Backups" folder?

 

[toke lahti]

Finder in the "client" mac(10.15) sees both the "Time Machine" disk (smb) and "Backups" folder (also smb), but they do not show in Time Machine setting, where you can add disks for timemachine...

 

[toke lahti]

I guess I can't set up the shared TM-drive the other way around?
(Connected to 10.15 as host, 10.11 as a client?)
I assume that the 10.11 version of TM has no clue about shared drives? Or 10.15 can't offer them in "a right way"?

 

[toke lahti]

Maybe there's a way to set the TM flag in Bonjour for that smb-share?
How?