Wired devices with MESH role only are not brought up and don't mesh
These devices don't have rescue IP nor VLAN 12 on top and, therefore, they are not brought up by the network daemon. As a consequence, BMX6 can't actually use them for meshing.
Putting them in a virtual interface does bring them up:
config interface 'mesh_e2' option device 'eth2' option auto '1'
[qmp-system] Put wired interfaces with MESH role in a virtual interface
Interfaces (e.g., eth2) with only MESH role, now without rescue addres
nor VLANs on top, need to be put inside a virtual interface (e.g.,
mesh_e2) for them to be activated by OpenWrt's network daemon, so that
they can be used by BMX6.
Signed-off-by: Roger Pueyo Centelles <firstname.lastname@example.org>