if interface[:role] and role = node[:networking][:roles][interface[:role]]
if role[interface[:family]]
node.default[:networking][:interfaces][name][:prefix] = role[interface[:family]][:prefix]
if interface[:role] and role = node[:networking][:roles][interface[:role]]
if role[interface[:family]]
node.default[:networking][:interfaces][name][:prefix] = role[interface[:family]][:prefix]