IP Neighbor discovery on L2TP connections?

RouterOS General
1

When an incoming L2TP connection is received on a MikroTik router the corresponding PPP interface
in the IP->Neighbors->discovery interfaces list is “disabled”. It cannot be enabled because it is a dynamic
interface. Is there some possibility to make it “enabled” by default, so the neighbor discovery works over
such links?

At the client side, the l2tp client interface appears in the list as enabled by default, and when tracing traffic
on the central router the UDP broadcasts to 255.255.255.255:5678 are received, so it should work when
the interface can be active in the discovery interfaces list.

2

I found there is a commandline-only setting for this:

/ip neighbor discovery settings set default-for-dynamic=yes