First of all you are going to need to find the optimum mtu for your situation to do so follow these instructions.
ping www.google.com -f -l 1500 (lower case F and L not a 1)
you will receive something similar to this.
Pinging www.l.google.com [66.102.9.105] with 1500 bytes of data: Packet needs to be fragmented [...]
