hello i tried to do what you write.
But you can’t.
Respectively, when I log in via SSH as root to GLiNet, so
a) I have nothing to edit, there is no nano editor (it is not possible to install via apt, apt does not recognize)
b) if I enter the / etc directory via the CD, then resolve.conf is not there.

I’m not a linux user, so sorry for the comment.

BTW, when I had Beryl as the main router, and connected the second Beryl as the client for it, it worked without problems (except for the main restart of the main one)

But as soon as I connect it to another router (ASUS, TP-LINK), then zero points. It does not recognize DHCP, or it writes DHCP, but it has no IP, I do not see it as a client on the main router (TP-LINK).
can you help me?
thanks