Can't create vrack, all interfaces have "NO-CARRIER"

I'm trying to create a vrack between 2 servers, both STOR-2.

One of them has ubuntu 20.04 and I created it without issues by following this https://support.us.ovhcloud.com/hc/en-us/articles/360008712939

the other one is an older ubuntu 18, I tried by following the same guide (even if the rest of the IPs are not set with netplan, but in /etc/systemd/network/50-default.network ) and with other methods, but without success.

There are 4 eno* interfaces, I tried with all of them (except eno3 with is the public one) but all of them give a "NO-CARRIER":!image|690x383
the same thing if I simply turn them up with ifconfig.

I rebooted the server multiple times.
The ovh manager says the vrack is set up, and I have 1gbps private bandwidth.

Any idea how could I do?