I am using a cable connection which is 16mbps download / 1mbps upload cable modem is cisco 2100 router Linksys e900 Router is set on DMZ, port forwarding enable for neccesary ports and the router is on auto dhcp. UPNP tried both enabled and disabled Router set the ps3 on permanent mac address so i could add it to dmz. The problem is that i am unable to do a speed test after the playstation obtain its ip address and NAT2. then the message below come up. it says my "router does not support IP fragments and communication may be restricted". So im assuming this is the cause of the lag when playing online game. I am connected using an ethernet cable through the router and have tried connecting straight from the cisco cable modem 2100 but problem still presist. However the only that has changed its the NAT number, which is NAT 1. Does anyone know if this is a router problem, isp or cable modem, which has lack of setting like icmp?