Recently got a E100 fibre internet connection. When testing with a laptop plugged into isp router, we receive 100mb up & 100 down. When connecting a sonicwall nsa 240 to the isp's router via sonicwall wan port which is set to 100mb full duplex, clients on the network will receive 100mb down but no more than 35mb up. I have tried auto negotiate but results are worse. Any ideas?