fix(em): add reserved ip info

Author: RoRoJ

bare-metal/elastic-metal/how-to/use-private-networks.mdx

@@ -52,6 +52,8 @@ You can choose to enable the Private Networks feature during the [creation of yo
 
 You can attach/detach Elastic Metal servers to a Private Network from either the Elastic Metal section of the console, or the VPC section.
 
+You can also reserve IP addresses with IPAM and attach them to specific MAC addresses, to facilitate the attachment of virtual machines hosted on your server, to Private Networks. See the IPAM documentation on [reserving a private IP with an attached MAC address](/network/ipam/how-to/#how-to-reserve-a-private-ip-address-with-an-attached-mac-address) for more information.
+
 ### From the Elastic Metal section of the console
 
 1. Navigate to the **Elastic Metal** page of the [Scaleway console](https://console.scaleway.com/elastic-metal/servers). A list of your Elastic Metal servers displays.

network/ipam/how-to/reserve-ip.mdx

@@ -88,6 +88,7 @@ The option to use a reserved IP displays when you attach the resource to a Priva
 
 - Attach a resource to a Private Network from the [Private Networks](/network/vpc/how-to/attach-resources-to-pn/) product dashboard
 - Attach an Instance to a Private Network from the [Instances](/compute/instances/how-to/use-private-networks/#how-to-attach-instances-to-an-existing-private-network) product dashboard
+- Attach an Elastic Metal server to a Private Network from the [Elastic Metal](/bare-metal/elastic-metal/how-to/use-private-networks/) product dashboard
 - Attach a Load Balancer to a Private Network from the [Load Balancer](/network/load-balancer/how-to/use-with-private-network/) product dashboard
 - Attach a Public Gateway to a Private Network from the [Public Gateways](/network/public-gateways/how-to/configure-a-public-gateway/#how-to-attach-a-public-gateway-to-a-private-network) product dashboard