fix(tuto): update tutorial with more configuration details (#5027)

* fix(tuto):  update tutorial with more configuration details

* feat(tuto): wording

Author: bene2k1

tutorials/setup-elastic-metal-proxmox-cluster-with-private-networks/index.mdx

@@ -59,7 +59,7 @@ Once the server has rebooted, the Proxmox web interface is available.
 
 ## Configuring the Private Network
 
-Instead of [configuring the Private Network interface directly from your server's command line](/elastic-metal/how-to/use-private-networks/#how-to-configure-the-network-interface-on-your-elastic-metal-server-for-private-networks), we must configure it using the Proxmox interface.
+Instead of [configuring the Private Network interface directly from your server's command line](/elastic-metal/how-to/use-private-networks/#how-to-configure-the-network-interface-on-your-elastic-metal-server-for-private-networks), it is required to configure it using the Proxmox interface.
 
 1. Click the Proxmox host in the data center menu on the left. The server's dashboard displays.
 2. Click **Network** in the **System** section of the menu. The network dashboard displays.
@@ -69,15 +69,52 @@ Instead of [configuring the Private Network interface directly from your server'
     <Lightbox src="scaleway-proxmox-vlan-details.webp" alt="" />
 
     * **Name**: The name of your primary network interface followed by a dot and the VLAN ID of your Private Network (e.g. `eno1.1918` for the primary network interface `eno1` and the VLAN ID `1918`)
-    * **IPv4/CIDR**: The IP address of the machine in your Private Network followed by its CIDR netmask (e.g. `192.168.1.101/24`)
+    * **(Optional) IPv4/CIDR**: The private IP of your server will be configured through DHCP if IPAM is configured correctly. Optionally, set the IP address of the machine in your Private Network followed by its CIDR netmask (e.g. `192.168.1.101/24`). 
     * **(Optional) Gateway (IPv4)**: The IP address of your [Public Gateway](/public-gateways/concepts/#public-gateway), if you want to use one.
     * **Autostart**: Tick this box to automatically bring up the interface during system startup.
 5. Click **Create** to create the Private Network interface.
+6. Click **Apply configuration** to activate the Private Network and to save the configuration.
     <Message type="note">
       Repeat the steps above on each node (in our case, each Elastic Metal server) you want to add to your Private Network.
     </Message>
 
-## Creating a cluster 
+### Network configuration on the console
+
+1. Open the file `/etc/network/interfaces` in a text editor and update any lines generated by Proxmox. Change lines such as `iface eno1.3010 inet manual` to `iface eno1.3010 inet dhcp`.
+2. In the same file, ensure that all lines generated by the Proxmox web UI are placed after the `vmbr0` interface declaration. Failing to do so will prevent both static and DHCP configurations from working correctly.
+3. Save the file and exit the text editor.
+    - Example of a `/etc/network/interfaces` file:
+    ```
+    auto lo
+    iface lo inet loopback
+
+    iface eno1 inet manual
+
+    iface eno2 inet manual
+
+    iface eno3 inet manual
+
+    iface eno4 inet manual
+
+    auto vmbr0
+    iface vmbr0 inet static
+            address 51.159.111.2/24
+            gateway 51.159.111.1
+            bridge-ports eno1
+            bridge-stp off
+            bridge-fd 0
+            hwaddress 44:a8:42:44:38:b4
+
+    # generated configuration that must be after vmbr0 declaration
+    auto eno1.3010
+    iface eno1.3010 inet dhcp
+    ```
+    <Message type="note">
+      If you choose to use DHCP, note that no DHCP client process runs automatically on the newly added interface. To resolve this, either run `dhclient` on the interface manually or reboot the server.
+    </Message>
+
+
+## Creating a cluster
 
 1. Click **Cluster** in the data center view of the Promox interface of your first node. The cluster dashboard displays.
     <Lightbox src="scaleway-proxmox-cluster-overview.webp" alt="" />