In the node attributes, populate the network_interfaces attribute (node['network_interfaces']. Give them these attributes:
:auto => iface['auto'] || true,
:type => iface['type'] || "static",
:device => iface['device'],
:netmask => iface['netmask'],
:address => iface['address']
Here's an example
"normal": { "network_interfaces": [ { "auto": "true", "type": "static", "device": "eth0", "netmask": "255.255.255.0", "address": "192.168.10.10" }, { "auto": "true", "type": "static", "device": "eth1", "netmask: "255.255.255.0", "address": "10.0.0.2" } ] }