Currently, if a client tries to connect to a NID that is not configured in LNet, the RPC is rejected. However, if a server has dynamic NIDs configured, it is possible that there is a race between NID configuration and client connections.

It should be possible to (optionally) allow a server to accept such connection requests from another interface rather than reject them. 

It would possibly make sense to allow connections on NIDs that are on interfaces which are aliases of the primary interface of the system, but I don't know how easily this can be detected in the kernel?