The router used is TP-LINK MR3020.

We use 192.169.123.* instead of the classic 192.168.0.*, so one can change config at http://192.169.123.254/.

To load this config, go in "System Tools" and then in "Backup & Restore"

Important point, for setting a new platform, one needs to reserve 192.169.123.1 to the node. This requires manual intervention in so far as each node has a different MAC address.