Arduino DNS on local - arduino

Question

How do I reference the address of the DNS serverIP, subnetIP, gatewayIP ?
As you can see from teh code below, I have tried but all I geet is the following error,
"class EthernetClass has no member called subnet".
#include <SPI.h>
#include <Ethernet.h>
// Network configuration
// Note : DNS server, gateway and subnet are optional.
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
// The IP address of Arduino Ethernet shield.
IPAddress myLocalIP(192, 168, 100, 2);
// The DNS server IP.
IPAddress dnsServer(192, 168, 100, 1);
// The router's gateway IP address.
IPAddress gateway(192, 168, 0, 1);
// the subnet:
IPAddress subnet(255, 255, 255, 0);
void setup() {
Serial.begin(9600);
Ethernet.begin(mac, myLocalIP, subnet); // Initialize the ethernet device
// Ethernet.begin(mac, ip, dnServer, gateway, subnet);
Serial.print("Local IP = "); // Print out the IP address of the shield.
Serial.println(Ethernet.localIP());
Serial.print("DNS Address = ");
Serial.println(Ethernet.IPAddress.subnet() );
} // End setup.
void loop()
{
} // End loop.
Wallek876, Thank you for the info.
I have added the others as well, namely subnetMask, gatewayIP however when I used the documented method (as per your link) to print the MAC address - namely - Ethernet.MACAddress(macBuffer); I got an error.
The documented code - (copied from the documentation) is as follows;
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(10, 0, 0, 177);
void setup() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Ethernet.begin(mac, ip);
byte macBuffer[6]; // create a buffer to hold the MAC address
Ethernet.MACAddress(macBuffer); // fill the buffer
Serial.print("The MAC address is: ");
for (byte octet = 0; octet < 6; octet++) {
Serial.print(macBuffer[octet], HEX);
if (octet < 5) {
Serial.print('-');
}
}
}
void loop () {}
The error being on line Ethernet.MACAddress(macBuffer);
MACAddress not defined.
I tried several other solutions all to no avail - so some suggetions would be greatefully received.