The --network= option to mkfs.lustre allows restricting a target (OST/MDT) to a given LNet network. This makes it register to the MGS with the specified network only. However, dynamic discovery is unaware of this restriction and this can create problems.

If this scenario is recognised, it is possible to deal with it in at least two ways:

1)  Prevent the mount with an error.

2) Disable dynamic discovery with a warning, prevent from enabling discovery in the future.