code: public OvhTask serviceName_network_POST(String serviceName, String description, String ipNet, Long vlanTag) throws IOException {
  		String qPath = "/router/{serviceName}/network";
  		StringBuilder sb = path(qPath, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "description", description);
  		addBody(o, "ipNet", ipNet);
  		addBody(o, "vlanTag", vlanTag);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhTask.class);
  	}
docs: Add a network to your router
  
  REST: POST /router/{serviceName}/network
  @param ipNet [required] Gateway IP / CIDR Netmask, (e.g. 192.168.1.254/24)
  @param description [required]
  @param vlanTag [required] Vlan tag from range 1 to 4094 or NULL for untagged traffic
  @param serviceName [required] The internal name of your Router offer